Fern Lake Trail

Route

Plan with 6 source-backed facts, 11 related records, and explicit uncertainty.

Route map

This overview is built from a reviewed, versioned source snapshot. It is planning evidence, not navigation-grade mapping.

Interactive map loads when scrolled into view.

StartDestination1.64 miles one way

Download generated GeoJSON · 6 canonical segments · source geometry accuracy not reported

Plan a visit

Routes and geography

Dataset route profile

Recorded for: Fern Lake Trail

Bidirectional
Yes
Distance basis
sum of selected USGS source-field lengthmiles values
Distance disagreement preserved
Yes
Geometry snapshot
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
One way distance miles
1.63727308
Published guide one way miles
2.2
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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: Fern Lake branch segment 1

Coordinate reference system
EPSG:4326
Dataset feature id
{640C335E-E97D-4AFA-9972-9EB7C21FE88D}
Dataset feature name
FERN LAKE
Dataset field
lengthmiles
Distance miles
0.02312443
Distance status
known
End coordinate
Latitude
37.75518889405645
Longitude
-119.10970322303906
Geometry snapshot
Feature id
{640C335E-E97D-4AFA-9972-9EB7C21FE88D}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
destination branch
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
5779
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.75505614511339
Longitude
-119.10931542400199
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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: Fern Lake branch segment 2

Coordinate reference system
EPSG:4326
Dataset feature id
{575C76F4-327E-416D-800F-204B8C948846}
Dataset feature name
FERN LAKE
Dataset field
lengthmiles
Distance miles
0.41641016
Distance status
known
End coordinate
Latitude
37.749934558112535
Longitude
-119.11017331731131
Geometry snapshot
Feature id
{575C76F4-327E-416D-800F-204B8C948846}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
destination branch
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
3017
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.75518889405645
Longitude
-119.10970322303906
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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: Fern Lake branch segment 3

Coordinate reference system
EPSG:4326
Dataset feature id
{C34CC487-0DD8-4B35-AD39-D4D7D5EFC550}
Dataset feature name
FERN LAKE
Dataset field
lengthmiles
Distance miles
0.18308846
Distance status
known
End coordinate
Latitude
37.7477281683504
Longitude
-119.10977426178702
Geometry snapshot
Feature id
{C34CC487-0DD8-4B35-AD39-D4D7D5EFC550}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
destination branch
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
3014
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.749934558112535
Longitude
-119.11017331731131
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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: Fern Lake branch segment 4

Coordinate reference system
EPSG:4326
Dataset feature id
{CC0670CA-9962-4ADB-AD02-7E39DE521507}
Dataset feature name
FERN LAKE
Dataset field
lengthmiles
Distance miles
0.10070099000000002
Distance status
known
End coordinate
Latitude
37.74658942963456
Longitude
-119.11071388472872
Geometry snapshot
Feature id
{CC0670CA-9962-4ADB-AD02-7E39DE521507}
Path
geometry/v0/snapshots/usgs-june-lake-yost-fern-routes-20260924.geojson
Sha256
f30e94212d25790e766c88b6a5914779bf381c3d19ef7a3e79a1ecdbfe10170b
Corridor role
destination branch
Route role
official mainline
Source dataset id
{8CC4DB36-D0BE-4189-88C7-64C3569EB754}
Source edit date
1774742400000
Source feature id
3013
Source load date
1777310283000
Source originator
U.S. Forest Service
Start coordinate
Latitude
37.7477281683504
Longitude
-119.10977426178702
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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.

Published route profile

Recorded for: Fern Lake Trail

One way miles
2.2
Route shape
out and back
Shared fork miles
1.5
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-fern-lake-june

  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

Explore related places

Access and approaches (2)

Land and management (6)

Routes and related places (3)

Before you go

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

Which candidate trailheads, roads, restrooms, and seasonal services will be open for the planned trip?

Access and developed facilities are seasonal and condition-dependent; recheck current Forest Service alerts and local trailhead status shortly before departure.

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.