Mount Eddy

Mount Eddy

Shasta Valley with a view of Mt. Shasta, Black Butte in the middle and to the right Eddy Mountain at sunset. | Daniel Lane Nelson

🏔️ Overview

Mount Eddy rises above Northern California’s Trinity Divide, where alpine lakes, wildflower-filled meadows, unusual serpentine soils, and weathered mountain ridges create one of the most distinctive landscapes in the Klamath Mountains. Standing approximately 9,033 feet above sea level, it is the highest summit in the Klamath Mountains and the highest point in Trinity County.

Although nearby Mount Shasta dominates the regional skyline, Mount Eddy belongs to an entirely different mountain system. Mount Shasta is a relatively young Cascade volcano, while Mount Eddy consists largely of ancient ultramafic rock that originated deep within the Earth.

The mountain’s most popular hiking route approaches through the Deadfall Lakes basin, following part of the Pacific Crest Trail before climbing past alpine ponds and foxtail pines to an expansive summit. Along the way, visitors encounter rare plants, glacially sculpted landscapes, and increasingly dramatic views across Northern California.

Mount Eddy is also one of California’s most prominent mountains. Its combination of ecological importance, accessible hiking, and exceptional summit scenery makes it far more than simply a smaller neighbor of Mount Shasta.

⚡ Fast Facts

Fact	Details
Continent	North America
Country	United States
State/Province	California
County/Region	Siskiyou and Trinity counties; highest point in Trinity County
Range	Trinity Mountains and Trinity Divide, Klamath Mountains
Parent Peak	Shastina, a subsidiary volcanic cone of Mount Shasta
Elevation	Approximately 9,033 feet / 2,753 meters
Prominence	Approximately 5,153 feet / 1,571 meters
Isolation	Approximately 13.27 miles / 21.36 kilometers
Nearest Higher Neighbor (NHN)	Green Butte
Coordinates	Approximately 41.31968° N, 122.47927° W
National Forest	Shasta-Trinity National Forest
Special Designation	Mount Eddy Research Natural Area
County High Point	Trinity County
Principal Trailhead	Parks Creek Trailhead
Popular Route	Pacific Crest Trail, Deadfall Lakes, and Mount Eddy summit trail
Typical Summit Hike	Approximately 10–11 miles round trip
Typical Elevation Gain	Approximately 2,300–2,500 feet
Best Hiking Season	Generally July through September; conditions vary
Notable Features	Deadfall Lakes, foxtail pines, rare serpentine plants, and views of Mount Shasta

📍 Location

Mount Eddy stands approximately eight miles west of the city of Mount Shasta in Northern California. Its summit lies near the boundary between Siskiyou and Trinity counties, within Shasta-Trinity National Forest.

The mountain rises along the Trinity Divide, an important highland region associated with the eastern Klamath Mountains. The surrounding landscape includes forested ridges, mountain meadows, glacial lakes, and the upper drainages of major Northern California river systems.

Although Mount Eddy is sometimes loosely associated with the Trinity Alps because of its proximity to that mountain region, it is more accurately classified within the Trinity Mountains and Trinity Divide. The Trinity Alps occupy a separate portion of the broader Klamath Mountains farther west.

The nearby communities of Mount Shasta and Weed provide convenient starting points for visitors. Most hikers approach the mountain via Interstate 5, Stewart Springs Road, and Forest Road 17, which climbs toward Parks Creek Trailhead.

From the trailhead, the Pacific Crest Trail traverses Mount Eddy’s western and northwestern slopes before connecting with paths leading toward the Deadfall Lakes and summit.

📏 Elevation & Prominence

Mount Eddy’s elevation varies slightly among published sources because different measurements rely on different surveying methods, vertical datums, and topographic datasets.

Older Forest Service publications and hiking guides commonly list the summit at 9,025 feet, while other references have reported 9,037 feet. More recent LiDAR-based data published by Peakbagger place the summit at approximately 9,032.8 feet, or 2,753.2 meters.

Regardless of the precise figure, Mount Eddy is the highest mountain in the Klamath Mountains and the highest point in Trinity County.

Its prominence is approximately 5,152.6 feet, making it one of California’s most topographically independent mountains. Because its prominence exceeds 1,500 meters, Mount Eddy qualifies as an ultra-prominent peak.

Topographic prominence describes how far a summit rises above the lowest connecting saddle leading toward higher terrain. In Mount Eddy’s case, that substantial vertical separation helps explain why the mountain remains such an important regional landmark despite being overshadowed visually by Mount Shasta.

Peakbagger identifies Shastina, a major subsidiary cone of Mount Shasta, as Mount Eddy’s topographic line parent. Its nearest higher neighbor in the same database is Green Butte, a higher summit on Mount Shasta’s southern flank.

Mount Eddy’s topographic isolation is approximately 13.27 miles. That figure measures the distance to the nearest terrain of equal or greater elevation rather than necessarily the distance to the summit of its parent mountain.

🪨 Geology

Mount Eddy belongs to one of the most geologically complicated mountain regions in North America. The Klamath Mountains were assembled from fragments of ancient oceanic crust, volcanic island arcs, sedimentary deposits, and other pieces of crust added to the western edge of the continent over immense spans of geologic time.

The mountain itself is underlain by the Trinity Ultramafic Pluton, a body of rock composed largely of peridotite. Portions of this rock have undergone serpentinization, a process that transforms ultramafic minerals through interactions with water.

These rocks are significant because they originated under conditions associated with the Earth’s upper mantle. Their presence at the surface reveals a long history of tectonic movement, uplift, exposure, and erosion.

Weathering of ultramafic and serpentine rock produces soils that are often thin, rocky, and chemically challenging for plants. Such soils may contain relatively high concentrations of certain metals while lacking nutrients needed by many common species.

The resulting environment favors specialized vegetation adapted to these unusual conditions. This relationship between bedrock and plant life is one reason Mount Eddy has attracted scientific attention.

Glaciation also helped shape the mountain. During colder periods of the Pleistocene, ice modified the Deadfall Lakes drainage and carved the basins that now contain several alpine lakes.

The contrast between Mount Eddy and Mount Shasta is particularly striking. Mount Eddy exposes ancient, highly altered ultramafic rock, while Mount Shasta consists primarily of volcanic material associated with the Cascade Range.

🌿 Flora & Fauna

Mount Eddy supports an exceptional variety of plant communities because its elevation, geology, moisture patterns, and soil chemistry create a mosaic of habitats within a relatively compact area.

The Mount Eddy Research Natural Area was established in part to protect an important population of foxtail pine, an uncommon high-elevation conifer associated with California’s mountain landscapes. The Forest Service identifies approximately 268 acres of foxtail pine forest within the research natural area.

Foxtail pines occupy rocky upper slopes, particularly above approximately 7,800 to 8,000 feet. Their irregular forms, dense clusters of needles, and ability to persist in exposed terrain contribute to the mountain’s distinctive subalpine character.

Other trees found in the area include western white pine, white fir, whitebark pine, and lodgepole pine. Forest composition changes with elevation, slope exposure, and proximity to lakes or streams.

Wet meadows and spring-fed areas support a completely different collection of plants. One of the most unusual is the California pitcher plant, also called cobra lily, which grows in specialized wet habitats and captures insects using modified leaves.

The Forest Service has documented numerous rare or locally significant plant species in the Mount Eddy area, including several buckwheats, drabas, bellflowers, and other plants associated with serpentine soils or high-elevation rocky slopes.

Altogether, researchers have recorded hundreds of plant taxa within the broader study area.

Wildlife commonly associated with these mountain habitats includes black bears, mule deer, squirrels, chipmunks, and a variety of songbirds and raptors. The lakes and surrounding wetlands also attract insects, amphibians, and other organisms adapted to seasonal mountain conditions.

Visitors should remain on established trails, particularly around moist meadows and fragile serpentine plant communities. A short detour across delicate ground can damage vegetation that may take years to recover.

Three leopard lily (Lilium pardalinum) blooms near a lakeshore on Mt. Eddy, Shasta–Trinity National Forest, California | Dominic Gentilcore PhD

🥾 Hiking & Climbing Routes

Parks Creek Trailhead to Mount Eddy

The most popular route to Mount Eddy begins at Parks Creek Trailhead, situated at approximately 6,800 to 6,850 feet along Forest Road 17.

From the trailhead, hikers follow the Pacific Crest Trail southward across the mountain’s western slopes. This initial section is relatively gentle and passes through forest openings, small meadows, and areas with views toward the Trinity Alps.

After approximately 2.5 to 3 miles, the trail approaches the Deadfall Lakes basin and intersects with the Sisson-Callahan National Recreation Trail.

Middle Deadfall Lake provides an appealing destination for hikers who prefer a shorter outing. The lake sits at approximately 7,259 feet and offers attractive shoreline scenery without requiring the more demanding summit climb.

Beyond the lower basin, the route climbs toward the upper lakes, including a higher lake at approximately 7,790 feet. The trail becomes steeper as it approaches Deadfall Summit, where a separate summit path branches toward Mount Eddy.

The final section climbs roughly 1,000 feet over approximately one mile. Switchbacks ascend the mountain’s southwestern slopes through increasingly open terrain, with extensive views emerging as the trail approaches the summit.

A complete summit hike generally covers approximately 10 to 11 miles round trip, with roughly 2,300 to 2,500 feet of cumulative elevation gain.

The route does not usually require technical climbing under dry summer conditions, but the combination of distance, elevation, exposure, and sustained climbing makes it a substantial day hike.

Deadfall Meadows Approach

An alternative route begins at the Deadfall Meadows Trailhead, located farther along Forest Road 17 beyond Parks Creek Trailhead.

After passing the Parks Creek parking area, the road descends to a prominent hairpin turn near Lower Deadfall Meadow. From there, a trail follows Deadfall Creek through meadows and forest toward the lake basin.

This approach is generally shorter than the Parks Creek route but begins at a lower elevation, which means the initial ascent can feel more sustained.

The Deadfall Meadows route is especially appealing to hikers interested in wildflowers, flowing water, and the meadow ecosystems surrounding the creek.

Once the route reaches the Deadfall Lakes area, hikers can continue along the same upper-basin and summit trails used by visitors approaching from Parks Creek.

Deadfall Lakes Without the Summit

Visitors who do not want to complete the entire Mount Eddy climb can enjoy an easier outing to the Deadfall Lakes.

The Pacific Crest Trail Association describes the Parks Creek-to-lake-basin hike as approximately 5.7 miles round trip, with comparatively modest elevation gain.

Middle Deadfall Lake is a particularly rewarding turnaround point for families, photographers, and hikers seeking alpine scenery without a steep final ascent.

Continuing to Upper Deadfall Lake adds additional climbing and distance but provides a closer view of Mount Eddy’s rocky western slopes.

Sisson-Callahan National Recreation Trail

The Sisson-Callahan National Recreation Trail provides access to the Mount Eddy area from additional trailheads and connects landscapes near Lake Siskiyou with the Trinity Divide.

A longer approach from lower elevations involves substantially more climbing than the Parks Creek route and may be better suited to experienced hikers or backpackers.

Historically, the trail also provided access to a Forest Service lookout on Mount Eddy’s summit. Remnants of the old lookout remain part of the mountain’s human history.

Hiking Safety and Preparation

Conditions on Mount Eddy can change quickly, especially near the exposed summit. Even during summer, hikers should prepare for wind, strong sun, sudden temperature changes, and afternoon thunderstorms.

Carry adequate water, food, sun protection, navigation tools, and additional clothing. Water from lakes or streams should be filtered or otherwise treated before drinking.

Lingering snow can obscure the trail early in the season, while wildfire smoke may affect air quality and visibility during summer or autumn. Always review current forest alerts, road conditions, fire restrictions, and weather forecasts before departing.

🏔️ Field Guide Tip: Start early enough to enjoy the Deadfall Lakes before climbing the exposed summit switchbacks. If the weather deteriorates or smoke reduces visibility, turning around at Middle or Upper Deadfall Lake still provides an excellent mountain outing.

🌤️ Best Time to Visit

The most reliable hiking season on Mount Eddy generally extends from July through September, although exact conditions vary with winter snowfall, spring temperatures, and regional wildfire activity.

Early Summer

June and early July may bring abundant wildflowers and strong flows through the mountain’s meadows and creeks. However, snow can linger near the upper lakes, Deadfall Summit, and the final summit trail.

Forest Road 17 and high-elevation trail access may also be affected by late-season snow. Hikers should verify conditions before assuming that the standard route is clear.

Midsummer

July and August usually provide the most dependable access to the Deadfall Lakes and Mount Eddy summit.

Wildflowers often remain prominent in the meadows, and the lakes create inviting rest stops during the climb. Sunny conditions can make the exposed upper slopes hot during the middle of the day, even when temperatures remain comfortable near the trailhead.

Wildfire smoke is an important concern during this period. A clear forecast does not always guarantee good visibility if regional fires are active.

Early Autumn

September and early October can offer cooler hiking temperatures, fewer insects, and quieter trails. Clear autumn days often provide particularly impressive views of Mount Shasta and the surrounding mountain ranges.

The tradeoff is increasing potential for early storms, freezing temperatures, and accumulating snow. Daylight also becomes more limited.

Winter

Heavy snow generally makes Mount Eddy a more serious winter objective. Access roads may be impassable, route-finding becomes more difficult, and avalanche or severe-weather hazards may exist in some conditions.

Winter travel should be reserved for experienced visitors with appropriate equipment, current forecasts, and strong backcountry judgment.

🧭 Nearby Mountains & Attractions

Mount Shasta

Mount Shasta rises prominently east of Mount Eddy and dominates the view from the summit.

At more than 14,000 feet, the volcanic peak belongs to the Cascade Range and provides a dramatic geological contrast to Mount Eddy’s older ultramafic terrain.

From Mount Eddy, hikers can observe the broad form of Mount Shasta, its neighboring cone Shastina, and ridges extending down the volcano’s flanks.

Green Butte

Green Butte is a rugged summit on Mount Shasta’s southern side.

Although it belongs to a different mountain system, Peakbagger identifies Green Butte as Mount Eddy’s nearest higher neighbor. Its location demonstrates how closely the Klamath Mountains and Cascade Range approach one another in this part of Northern California.

Deadfall Lakes

The Deadfall Lakes form a scenic chain of alpine lakes below Mount Eddy’s western slopes.

Their surrounding meadows, forests, and rocky basins offer excellent opportunities for hiking, photography, and observing high-elevation plant communities.

Visitors should avoid camping in fragile meadows or immediately beside sensitive shoreline habitats. The Forest Service specifically notes that the meadow near Upper Deadfall Lake is vulnerable to damage.

Thompson Peak

Thompson Peak is the highest summit in the Trinity Alps, a separate region within the broader Klamath Mountains.

While Mount Eddy is slightly higher and more accessible by established trail, Thompson Peak offers a more remote wilderness experience involving long approaches and more challenging summit terrain.

Caesar Peak

Caesar Peak rises in the Trinity Alps near Thompson Peak and contributes to one of Northern California’s most rugged alpine landscapes.

Its relationship to Mount Eddy highlights the diversity of the Klamath Mountains, which include everything from serpentine ridges and foxtail pine forests to steep granite basins.

Gibson Peak

Gibson Peak provides another compelling example of the rugged mountains farther west in the Trinity Alps.

Like Mount Eddy, it belongs to the greater Klamath Mountains region, although its setting, access, and surrounding terrain differ considerably.

Castle Crags

Castle Crags lies southeast of Mount Eddy and is recognizable for its dramatic granite towers.

Trails in the Castle Crags area provide a different introduction to Northern California’s mountain geology, with steep forested approaches leading toward exposed granite formations.

Lake Siskiyou

Lake Siskiyou sits near the city of Mount Shasta and provides a convenient lower-elevation destination for visitors exploring the surrounding mountains.

Its shoreline trails, water views, and access to nearby trail systems make it an attractive complement to a Mount Eddy hiking trip.

💡 Fun Facts

Mount Eddy is the highest summit in the Klamath Mountains.
It is also the highest point in Trinity County.
Recent LiDAR measurements place the summit at approximately 9,033 feet, although older references commonly list 9,025 or 9,037 feet.
With more than 5,150 feet of prominence, Mount Eddy qualifies as an ultra-prominent mountain.
Peakbagger identifies Mount Eddy as the highest mountain in the United States west of Interstate 5.
Mount Eddy’s topographic parent is Shastina, a volcanic cone associated with Mount Shasta.
Its nearest higher neighbor in Peakbagger’s database is Green Butte.
The mountain is composed largely of ultramafic rock, including peridotite altered through serpentinization.
The Mount Eddy Research Natural Area protects important foxtail pine forests and rare plant communities.
Researchers have documented approximately 289 plant taxa within the Mount Eddy study area.
California pitcher plants occur in wet habitats associated with the Deadfall Lakes region.
A historic Forest Service fire lookout once stood on the summit and was abandoned in 1932.
Despite its proximity to Mount Shasta, Mount Eddy is not a volcano.
The Deadfall Lakes basin shows evidence of past glaciation.

❓ FAQ

Where is Mount Eddy?

Mount Eddy is located in Northern California, west of the city of Mount Shasta and near the boundary between Siskiyou and Trinity counties. It lies within Shasta-Trinity National Forest.

How tall is Mount Eddy?

Recent LiDAR-based data place Mount Eddy at approximately 9,033 feet, or 2,753 meters. Older sources variously list the summit at 9,025 or 9,037 feet.

Is Mount Eddy the highest mountain in the Klamath Mountains?

Yes. Mount Eddy is recognized as the highest summit in the Klamath Mountains and the highest point in Trinity County.

Is Mount Eddy part of the Trinity Alps?

Mount Eddy belongs to the Trinity Mountains and Trinity Divide within the broader Klamath Mountains. The Trinity Alps are a separate mountain region farther west.

Is Mount Eddy a volcano?

No. Unlike nearby Mount Shasta, Mount Eddy is not a volcano. It consists largely of ancient ultramafic rock, including peridotite that has undergone varying degrees of serpentinization.

How long is the hike to Mount Eddy?

The standard route from Parks Creek Trailhead through the Deadfall Lakes basin generally covers approximately 10 to 11 miles round trip.

How much elevation gain does the Mount Eddy hike involve?

Most hikers should expect approximately 2,300 to 2,500 feet of elevation gain, depending on the chosen trailhead, route, and side trips.

Is Mount Eddy difficult to hike?

The standard summer route is nontechnical but moderately strenuous because of its overall distance, high elevation, and steep final climb.

The hike to Middle Deadfall Lake is considerably easier and provides an excellent alternative for visitors who do not want to continue to the summit.

Can beginners hike Mount Eddy?

Fit beginners with prior hiking experience may be able to complete the summit route under favorable summer conditions. However, the distance, altitude, and exposed final ascent make it more demanding than a short introductory hike.

Beginners who prefer a gentler experience can hike from Parks Creek Trailhead to Middle Deadfall Lake.

What is the best time to hike Mount Eddy?

July through September usually offers the most reliable conditions. Lingering snow, wildfire smoke, road closures, and autumn storms can affect access and safety.

Can you camp at the Deadfall Lakes?

Camping may be possible in appropriate established locations around portions of the Deadfall Lakes basin, subject to current Forest Service regulations and restrictions.

Avoid fragile meadows and sensitive lakeshore habitats. California campfire permits may be required for campfires, charcoal fires, or portable gas stoves outside designated recreation sites, and temporary fire restrictions can prohibit fires even when a permit has been issued.

Do you need a Mount Shasta summit permit to hike Mount Eddy?

No. Mount Shasta summit permits apply to designated activities on Mount Shasta, not to a standard hike up Mount Eddy.

However, visitors should check current Forest Service rules concerning parking, camping, stoves, fire restrictions, and temporary closures.

What can you see from Mount Eddy’s summit?

On a clear day, the summit provides extensive views of Mount Shasta, the Trinity Alps, surrounding Klamath Mountains, Castle Crags, and distant Cascade volcanoes. Depending on visibility, hikers may also see toward Lassen Peak and Mount McLoughlin.

What makes Mount Eddy ecologically important?

Mount Eddy supports uncommon foxtail pine forests, rare plants adapted to serpentine soils, high-elevation meadows, and specialized wetland species such as California pitcher plants.

Its research natural area protects a representative collection of these unusual mountain ecosystems.

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