Ershim Lake

California

California

Free — you'll pick up right here.

0.9 mi

Distance

103 ft

Gain

No verdict for this trail

We won't guess. Here is exactly what we do and don't know.

What we do know

  • Inside Sierra National Forest

    3 managing-area boundaries mapped — agency alerts for them feed this page automatically.

    Boundary data

What's missing

  • No access route mapped

    We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.

Nobody's filed a report here yet — be the first.

Why you'll love it

Dinkey Lakes Wilderness wilderness
Quick trip — under 2 mi
Out & back

Here's your day, mapped

Ershim Lake

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Elevation & route

Distance
0.9 mi
Elevation gain
103 ft
Highest point
8,949 ft
Lowest point
8,828 ft
More about this trail ↓

Photos

Directions & GPX

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Permits & access

Managing agency
Forest Service
Wilderness area
Dinkey Lakes Wilderness
Surface
Natural
Accessibility
Not an accessible trail (Forest Service accessibility status)

Source for surface, accessibility: USDA Forest Service National Forest System Trails (EDW)

About this trail

Ershim Lake is a short out-and-back trail in California managed by the Forest Service. The route gains 181 feet of elevation over 0.90 miles.

Facts about this trail

The climb

High point
8,949 ft
Length (round trip)
0.9 mi
Shape
Out and back

Source: Roamze elevation profile and trail geometry (DEM samples along the mapped route)

When to go

Typical monthly averages (not a forecast) from the Mammoth Lakes Rs, CA weather station, 30 mi away. High / low in °F.

  1. Jan41° high17° low
  2. Feb41° high18° low
  3. Mar45° high22° low
  4. Apr51° high27° low
  5. May60° high35° low
  6. Jun70° high42° low
  7. Jul78° high49° low
  8. Aug77° high47° low
  9. Sep71° high40° low
  10. Oct61° high30° low
  11. Nov49° high23° low
  12. Dec41° high17° low

The station sits about 1,100 ft lower than this spot, so expect it to run cooler up here.

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Managed by
Forest Service

Source: Wilderness.net boundaries; USFS EDW boundaries; USGS PAD-US 4.1

Conditions

Active alerts for Sierra National Forest as of Oct 10, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

Add to a trip & share

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Guided trips nearby

Local operatorsoffering guided trips. You book directly with them — Roamze doesn’t take a cut.

Bishop Pack Outfitters

Hiking business nearby (~25 mi away) — hasn't claimed their Roamze page yet

View operator

Mammoth Lakes Pack Outfit

Hiking business nearby (~27 mi away) — hasn't claimed their Roamze page yet

View operator

Rainbow Pack Outfitters

Hiking business nearby (~28 mi away) — hasn't claimed their Roamze page yet

View operator