Big Obsidian Flow Trail
Easy · FernNewberry National Volcanic Monument, Oregon
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Add the first0.9 km0.5 mi
Distance
57 m187 ft
Elevation gain
15m
Est. time
Route
Route type
What to expect on this trail
- Paved
- Steep
- Rolling
- Hiking
How these were worked out
- Pavedrecorded
- OpenStreetMap records the surface of this trail as "asphalt". Source: OpenStreetMap, high confidence.
- Steepestimated
- Nine tenths of this trail is at or below a 23.4% grade, and its steepest climb reaches 50.2%. Source: DEM terrain profile, low confidence.
- Rollingestimated
- The grade varies by 15.6 percentage points along the route rather than climbing steadily. Source: DEM terrain profile, low 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.
Fern's Friendly Walk A gentle wander — great for kids, dogs, and wildflower stops.
About this trail
Big Obsidian Flow Trail is a 0.9 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
Loading forecast…
Elevation profile
Terrain sampled every 35 m from public elevation data.
- Descent
- 19 m
- High point
- 2009 m
- 90th percentile grade
- 23.4%
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
53% confidence - score 51/100
- - Terrain: 23.4% 90th-percentile grade and 67 m climbing per km.
- - Surface: asphalt.
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
Trails nearby
Other routes within about 15 km.
- less than 100 m away
Silica Trail
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858 m · 15m · ↑ 18 m
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Newberry Crater Trail
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Little Crater Trail #3953
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3.53 km · 1h 5m · ↑ 183 m
- 700 m away
Lost Lake Trail #3958.2
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- 850 m away
Paulina Lakeshore Trail #3955
Hard · IvyNewberry National Volcanic Monument, Oregon
9.35 km · 2h 10m · ↑ 74 m
- 2.0 km away
Lost Lake South Trail
Easy · FernNewberry National Volcanic Monument, Oregon
1.09 km · 15m · ↑ 10 m
- 2.4 km away
Paulina Peak Trail 3951
Easy · FernNewberry National Volcanic Monument, Oregon
507 m · 5m · ↑ 0 m
- 2.5 km away
Crater Rim Trail 3957
Hard · IvyNewberry National Volcanic Monument, Oregon
14.74 km · 3h 55m · ↑ 374 m
- 3.5 km away
Crater Rim Trail #3957
Hard · IvyNewberry National Volcanic Monument, Oregon
17.94 km · 4h 45m · ↑ 465 m
- 3.5 km away
Peter Skene Ogden Trail #3956
Moderate · AceNewberry National Volcanic Monument, Oregon
3.78 km · 50m · ↑ 0 m
- 4.3 km away
Cinder Cone Trail
Easy · FernNewberry National Volcanic Monument, Oregon
562 m · 5m · ↑ 0 m
- 4.4 km away
Newberry Crater Trail #3958
Moderate · AceNewberry National Volcanic Monument, Oregon
3.72 km · 1h 15m · ↑ 268 m
Photos
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Frequently asked
How long is Big Obsidian Flow Trail?
Big Obsidian Flow Trail is 0.9 km (0.5 miles) as a route. Allow roughly 15m at a steady walking pace, not counting stops.
How hard is Big Obsidian Flow Trail?
OpenTrail rates it easy. It climbs about 57 m overall, and its steepest sustained stretches run around 23%.
Where is Big Obsidian Flow Trail?
Big Obsidian Flow Trail is in Newberry National Volcanic Monument, Oregon. The map on this page shows the full route, where it starts, and any mapped parking nearby.
Is there parking at Big Obsidian Flow 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.