Thorn Prairie (FR 3401000) in OR

Road corridorUmpqua NF, Diamond Lake Ranger District

32 mi from Oakridge

Maps 2,508 ft

Dispersed camping generally allowed

U.S. Forest Service default; a local order can restrict it.

Motor-vehicle season 5/1–11/30Stay limit: 14 consecutive days · 28 days total per calendar year · then move 5 mi

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Difficult

All 18.9 miles of this road are maintained for high-clearance vehicles, mostly gravel with 1.4 miles of dirt.
Near Umpqua Hot Springs.
Estimated climb: 3,200 ft over 18.9 miles through 3 switchbacks, with sustained grades near 14% and pitches to 46%.
Terrain estimates show roadside drops of up to ~150 ft on the downhill side.
Dead-end road; turnaround space is not mapped.

3 known camp spots along this road, between mile 4.1 and mile 6.2: reported by travellers.

Limited privacy

Limited separation from through roads or other sites here, with the nearest through road 0.1 miles off.
Pig Iron Mountain stands 2,909 ft above the map pin, 1.9 miles southeast.
North Umpqua River runs 0.1 mi off.

Generally, you cannot camp within a mile of developed recreation areas such as trailheads or picnic areas.
Camping rules

September normals 45–77°F, 1.5″ precipitation. Monthly averages, PRISM 1991–2020.

Thorn Prairie (FR 3401000) in OR -- Camping Rules & Access in Oregon