Lost Lake Trail
Moderate · AceUmatilla National Forest, Oregon
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Add the first5.7 km3.5 mi
Distance
460 m1509 ft
Elevation gain
2h 0m
Est. time
Route
Route type
What to expect on this trail
- Steep
- Sustained climb
- Hiking
How these were worked out
- Steepestimated
- Nine tenths of this trail is at or below a 18.1% grade, and its steepest climb reaches 27.5%. Source: DEM terrain profile, moderate confidence.
- Sustained climbestimated
- This trail gains 81 m of elevation per kilometre. Source: DEM terrain profile, moderate confidence.
Biking is not listed. That means no explicit permission is recorded, which is not the same as a prohibition — see the bike section below.
Ace's Active Trek A real workout with honest climbing — pack water and snacks.
About this trail
Lost Lake Trail is a 5.7 km trail in Oregon. Route imported from OpenStreetMap (© OpenStreetMap contributors, ODbL); community descriptions, photos, and condition reports welcome.
Play the route
Fly the trail end to end, with the climb as it comes.
Conditions
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Elevation profile
Terrain sampled every 35 m from public elevation data.
- Descent
- 52 m
- High point
- 2089 m
- 90th percentile grade
- 18.1%
Bike access & suitability
Legal permission and physical difficulty are evaluated separately.
Legal access
Confirm before riding
Estimated MTB suitability
Moderate
35% confidence - score 45/100
- - Terrain: 18.1% 90th-percentile grade and 81 m climbing per km.
Source: No access source recorded - checked Aug 2, 2026 - rules v2
Posted signs and current land-manager closures always override OpenTrail.
Report incorrect bike access
Connecting trails
Trails whose path meets this one — plan a longer route or a loop.
Trails nearby
Other routes within about 15 km.
- 3.1 km away
South Fork Desolation Trail
Hard · IvyUmatilla National Forest, Oregon
12.79 km · 4h 5m · ↑ 724 m
- 5.7 km away
Saddle Camp - Lost Creek tie trail
Easy · FernUmatilla National Forest, Oregon
2.54 km · 40m · ↑ 45 m
- 5.8 km away
Saddle Camp Trail
Moderate · AceNorth Fork John Day Wilderness - Greenhorn Unit, Oregon
4.52 km · 1h 35m · ↑ 325 m
- 6.2 km away
Lost Creek Trail
Hard · IvyNorth Fork John Day Wilderness - Greenhorn Unit, Oregon
8.15 km · 2h 40m · ↑ 493 m
- 7.8 km away
Princess Trail
Easy · FernMalheur National Forest, Oregon
2.27 km · 35m · ↑ 56 m
Photos
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Frequently asked
How long is Lost Lake Trail?
Lost Lake Trail is 5.7 km (3.5 miles) as a route. Allow roughly 2h 0m at a steady walking pace, not counting stops.
How hard is Lost Lake Trail?
OpenTrail rates it moderate. It climbs about 460 m overall, and its steepest sustained stretches run around 18%.
Where is Lost Lake Trail?
Lost Lake Trail is in Umatilla National Forest, Oregon. The map on this page shows the full route, where it starts, and any mapped parking nearby.
Is there parking at Lost Lake Trail?
No parking area is mapped within 1.5 km of this route in OpenStreetMap. That is not the same as there being none — check local access rules before you go.