calipeaks.com

Gene Marshall–Piedra Blanca Trail

Ventura · Managed by Los Padres National Forest (USFS) · Region: Sespe Wilderness
Difficulty 36/100 · Moderatepoint to point#sespe-wilderness#national-recreation-trail#hot-springs-country#point-to-point
Distance
18.6 mi
Total gain
4,000 ft
Net gain
4,000 ft
Net loss
0 ft
Elevation
3,012–3,081 ft
Days
3–4
Permit
Not required
Campfires
Campfires allowed seasonally

Overview

The Gene Marshall–Piedra Blanca Trail is the Sespe Wilderness's signature traverse: 18.6 miles from Piedra Blanca's sandstone cliffs to Reyes Creek, past hot-springs country and seven trail camps. A National Recreation Trail and one of Southern California's classic desert-to-mountain crossings.

Highlights

  • Piedra Blanca's white sandstone formations at the trailhead
  • Seven trail camps strung along the route — Twin Forks, Pine Mountain Lodge, and the rest
  • The Sespe's hot-springs country nearby
  • A complete point-to-point through a wilderness with no permits and no quotas

How hard is Gene Marshall–Piedra Blanca Trail?

CaliPeaks rates this route 36/100 (Moderate). The score weights five factors: climbing counts for 45% — 4,000 ft puts this trip at 33% of the reference climb; distance 20% at 18.6 miles; maximum altitude 15% at 3,081 ft; route technicality 10% (established trail throughout); and trip length 10% at 4 days. A score under 20 suits first-time backpackers; 60+ means serious endurance. See how we score difficulty for the full method.

Logistics

  • Trailhead: Piedra Blanca Trailhead · parking: End of Rose Valley Road (Forest Rte 6N31) off Highway 33; exit via Reyes Creek on the north side
  • Water: Seasonal creeks along the route; treat all water and confirm flows.
  • Resupply: None; Ojai and Frazier Park have services at the ends.
  • Shuttle: Point-to-point — arrange a car spot or shuttle between Piedra Blanca and Reyes Creek trailheads.

Permits

No wilderness permit is required for this route (per Los Padres National Forest (USFS)).

Campfires & stove regulations

Campfires allowed seasonally. Fires are allowed only in designated fire rings, and forest-wide fire restrictions are common — check current alerts. A California Campfire Permit is required for stoves. Current fire restrictions. Rules change with conditions — always confirm with the managing agency before your trip.

Best time to go

Best months: March, April, May, October, November.

Snow: Winter snow is possible at higher elevations.

Heat: Summer heat and sun exposure are the rule — spring and fall are ideal.

Bugs: Poison oak and ticks in warm months.

Weather forecast

Know before you go

  • Point-to-point logistics — arrange transport between trailheads
  • Summer heat and sun exposure are severe
  • Winter snow is possible at higher elevations
  • Water is seasonal — confirm creek flows before relying on them

Sources & citations

Data compiled 2026 from public agency and reference sources. All descriptive text on this page is original; verify current conditions with the managing agency before your trip.

  1. SRTM90 elevation data (sampled). OpenTopoData (SRTM, NASA/USGS-derived open data) via Photon geocoding (OpenStreetMap). https://www.opentopodata.org/. Accessed 2026-09-10. Elevation sampled at geocoded coordinates; location from OpenStreetMap data (ODbL).
  2. Gene Marshall-Piedra Blanca Trail 22W03. Los Padres National Forest (U.S. Forest Service). https://www.fs.usda.gov/r05/lospadres/recreation/trails/gene-marshall-piedra-blanca-trail-22w03. Accessed 2026-09-10. License: Public domain (US government work). Trail distance (18.6 mi), trailhead coordinates and elevation (3,000 ft), difficulty rating (Moderate to Difficult), camp list, National Recreation Trail designation, and Sespe Wilderness setting.
  3. Los Padres Fire Use and Firearm Restrictions. Los Padres National Forest (U.S. Forest Service). https://www.fs.usda.gov/r05/lospadres/alerts/los-padres-fire-use-and-firearm-restrictions. Accessed 2026-09-10. License: Public domain (US government work). Current fire-use restrictions for the forest.
  4. Mt. Pinos Ranger District. Los Padres National Forest (U.S. Forest Service). https://www.fs.usda.gov/r05/lospadres/offices/mt-pinos-ranger-district. Accessed 2026-09-10. License: Public domain (US government work). Ranger district contact information for trail conditions.