Yost and Fern Lakes Trailhead

Trailhead

Plan with 6 source-backed facts, 6 related records, and explicit uncertainty.

Plan a visit

Getting there

Reviewed access point coordinate

Recorded for: Yost and Fern Lakes Trailhead

Geometry snapshot
Feature id
trailhead-yost-fern
Path
geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson
Sha256
ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968
Latitude
37.76178296524957
Longitude
-119.11332825146656
Navigation grade
No
Provenance
reviewed usgs route endpoint
Source feature id
{5C45A880-E365-468D-B642-2DBB0DDD818B}
Source ids
  • source-usgs-national-digital-trails-eastern-sierra-20260924
Evidence and sources (1)

No claim effective interval recorded.

No claim spatial scope recorded.

  1. Evidence stance: supports · Evidence details

    Reviewed National Digital Trails features place evidenced route endpoints at the Parker Lake, McGee Creek, Tamarack Lakes, Mosquito Flat, North Lake, Sabrina Basin, South Lake, Yost/Fern, Upper Rock Creek/East Fork, and Lundy Canyon access identities. The Lundy endpoint is independently corroborated by a named OpenStreetMap trailhead point approximately ten meters away.

    Publisher
    U.S. Geological Survey / U.S. Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-25T13:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: U.S. Geological Survey / U.S. Forest Service

    Recorded artifact references
    • geometry/v0/snapshots/eastern-sierra-trailhead-points-20260925.geojson
    • ea8e63ced14acdff52ace60f067deef10538830e224e1e853be069f8aba74968

    References are not a confirmation of current availability.

Routes and geography

Official dataset route segment

Recorded for: Yost and Fern shared segment 1

Coordinate reference system
EPSG:4326
Dataset feature id
{5C45A880-E365-468D-B642-2DBB0DDD818B}
Dataset feature name
YOST MEADOW LOOP
Dataset field
lengthmiles
Distance miles
0.0275589
Distance status
known
End coordinate
Latitude
37.76140837355705
Longitude
-119.11319787431923
Geometry snapshot
Feature id
{5C45A880-E365-468D-B642-2DBB0DDD818B}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
shared corridor
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
3386
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.76178296524957
Longitude
-119.11332825146656
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-trailhead-yost-fern

  1. Evidence stance: supports · Evidence details

    Ten selected public-domain trail features form a connected Yost/Fern network: two shared features lead from the retained dataset entry to the branch, four continue to Fern Lake, and four continue to Yost Lake. The retained source-field distances do not fully agree with the separately published USFS hiking-guide distances.

    Publisher
    U.S. Geological Survey / U.S. Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-24T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: U.S. Geological Survey / U.S. Forest Service

    Recorded artifact references
    • geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
    • f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b

    References are not a confirmation of current availability.

Official dataset route segment

Recorded for: Yost and Fern shared segment 2

Coordinate reference system
EPSG:4326
Dataset feature id
{5A898C56-83C6-4AB1-A105-34472F1BC040}
Dataset feature name
YOST MEADOW LOOP
Dataset field
lengthmiles
Distance miles
0.88639014
Distance status
known
End coordinate
Latitude
37.75505614511339
Longitude
-119.10931542400199
Geometry snapshot
Feature id
{5A898C56-83C6-4AB1-A105-34472F1BC040}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
shared corridor
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
6668
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.76140837355705
Longitude
-119.11319787431923
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-trailhead-yost-fern

  1. Evidence stance: supports · Evidence details

    Ten selected public-domain trail features form a connected Yost/Fern network: two shared features lead from the retained dataset entry to the branch, four continue to Fern Lake, and four continue to Yost Lake. The retained source-field distances do not fully agree with the separately published USFS hiking-guide distances.

    Publisher
    U.S. Geological Survey / U.S. Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-24T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: U.S. Geological Survey / U.S. Forest Service

    Recorded artifact references
    • geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
    • f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b

    References are not a confirmation of current availability.

Route profile

Recorded for: Yost and Fern Lakes Trailhead

Fern beyond fork miles
0.7
Fern total one way miles
2.2
Shared distance to fork miles
1.5
Yost beyond fork miles
2.3
Yost total one way miles
3.8
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-trailhead-yost-fern

  1. Evidence stance: supports · Evidence details

    The Mono Basin day-hike guide maps Parker Lake, Yost and Fern Lakes, and Lundy Canyon. Parker Lake is 1.8 miles one way. The Yost/Fern route splits 1.5 miles from its trailhead; Fern Lake is another 0.7 mile and Yost Lake another 2.3 miles. Lundy Canyon reaches 20 Lakes Basin in 5.4 miles one way; its bottom two-thirds are easier and its upper third climbs steep switchbacks. The guide publishes road and parking directions for each trailhead.

    Publisher
    USDA Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T23:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: USDA Forest Service

Trailhead operational profile

Recorded for: Yost and Fern Lakes Trailhead

Parking
Capacity
unknown
Overflow
unknown
Status
unknown
Potable water
Status
unknown
Road access
Location
approximately one mile south of Silver Lake on Highway 158
Surface
paved
Route connector
Description
Official guide depicts the shared Yost/Fern route beginning at the trailhead.
Exact geometry
schematic
Status
depicted
Toilets
Status
unknown
Evidence and sources (1)

No claim effective interval recorded.

No claim spatial scope recorded.

  1. Evidence stance: supports · Evidence details

    The guide places Lundy Canyon trail access on Lundy Lake Road seven miles north of Lee Vining and the trailhead parking two miles west of Lundy Lake. It identifies extra parking about one mile down-canyon and depicts the final approach beyond Lundy Lake as dirt road. It places the Yost/Fern trailhead about one mile south of Silver Lake on paved Highway 158 and depicts both routes beginning at that trailhead. It does not publish stall counts, toilets, potable water, or Yost/Fern overflow parking.

    Publisher
    USDA Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-25T22:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: USDA Forest Service

    Recorded artifact references
    • Mono Basin Day Hikes, pages 1-2

    References are not a confirmation of current availability.

More planning facts

Land unit context

Recorded for: Yost and Fern Lakes Trailhead

Managing unit
Inyo National Forest
Mapped routes
  • Parker Lake
  • Yost Lake
  • Fern Lake
Wilderness
Ansel Adams Wilderness
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-trailhead-yost-fern

  1. Evidence stance: supports · Evidence details

    The official Inyo National Forest June Lakes Area Trails map depicts Parker Lake and the Yost and Fern routes in relation to Ansel Adams Wilderness, alongside June Lake Loop roads, trailheads, campgrounds, and the neighboring Owens River Headwaters Wilderness.

    Publisher
    USDA Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T23:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: USDA Forest Service

Explore related places

Access and approaches (5)

Land and management (1)

Before you go

These open questions need confirmation; Wayproof does not fill them with guesses.

What parking arrangement and capacity, overflow, toilets, and potable-water service apply at Yost and Fern Lakes Trailhead?

The official guide establishes the paved-road location and route start but does not publish these operating details.

Open question. Linked evidence does not resolve this gap.

No specific claim evidence is linked to this question.

Why do the retained National Digital Trails length fields disagree with the USFS Mono Basin hiking-guide distances for the Yost/Fern shared corridor and Yost branch?

The route geometry is connected and useful for map context, but Wayproof does not replace the official hiking-guide distances or claim survey-grade geometry from the dataset fields.

Open question. Linked evidence does not resolve this gap.

Route profile

Fern beyond fork miles
0.7
Fern total one way miles
2.2
Shared distance to fork miles
1.5
Yost beyond fork miles
2.3
Yost total one way miles
3.8
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-trailhead-yost-fern

  1. Evidence stance: supports · Evidence details

    The Mono Basin day-hike guide maps Parker Lake, Yost and Fern Lakes, and Lundy Canyon. Parker Lake is 1.8 miles one way. The Yost/Fern route splits 1.5 miles from its trailhead; Fern Lake is another 0.7 mile and Yost Lake another 2.3 miles. Lundy Canyon reaches 20 Lakes Basin in 5.4 miles one way; its bottom two-thirds are easier and its upper third climbs steep switchbacks. The guide publishes road and parking directions for each trailhead.

    Publisher
    USDA Forest Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T23:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: USDA Forest Service

Sources, evidence, and history

Planning facts above are readable first. Open these records when you need to audit a source or see when knowledge changed.

Evidence for 6 published claims
Published ChangeSet history

Canonical data is historical evidence, not a guarantee of current conditions. Recheck volatile facts before travel.