United States Forest Service Road 8172
Moderate · AceSiuslaw National Forest, Oregon
No photos yet
Add the first7.9 km4.9 mi
Distance
525 m1722 ft
Elevation gain
2h 40m
Est. time
Route
Route type
- Parking nearby
What to expect on this trail
- Gravel
- Steep
- Rolling
- Hiking
How these were worked out
- Gravelrecorded
- OpenStreetMap records the surface of this trail as "gravel". Source: OpenStreetMap, high confidence.
- Steepestimated
- Nine tenths of this trail is at or below a 20.5% grade, and its steepest climb reaches 34.5%. Source: DEM terrain profile, high confidence.
- Rollingestimated
- The grade varies by 12.1 percentage points along the route rather than climbing steadily. 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
United States Forest Service Road 8172 is a 7.9 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
- 220 m
- High point
- 551 m
- 90th percentile grade
- 20.5%
Bike access & suitability
Legal permission and physical difficulty are evaluated separately.
Legal access
Confirm before riding
No authoritative or explicit bicycle-access rule is recorded for this trail.
Estimated MTB suitability
Difficult
65% confidence - score 69/100
- - Terrain: 20.5% 90th-percentile grade and 66 m climbing per km.
- - Surface: gravel.
- - Track firmness: grade2.
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.
Photos
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Reviews
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Frequently asked
How long is United States Forest Service Road 8172?
United States Forest Service Road 8172 is 7.9 km (4.9 miles) as a route. Allow roughly 2h 40m at a steady walking pace, not counting stops.
How hard is United States Forest Service Road 8172?
OpenTrail rates it moderate. It climbs about 525 m overall, and its steepest sustained stretches run around 21%.
Where is United States Forest Service Road 8172?
United States Forest Service Road 8172 is in Siuslaw National Forest, Oregon. The map on this page shows the full route, where it starts, and any mapped parking nearby.
Is there parking at United States Forest Service Road 8172?
One mapped parking area sits within 1.5 km of the route. Parking comes from OpenStreetMap, so check the signage when you arrive.