USDA Forest Service, Stanislaus NF · Data Source: Recreation.gov
About
Overview Dimond O is ideally located closest to Yosemite National Park's Big Oak Flat entrance and Hetch Hetchy. It's nestled near the banks of the scenic Middle Fork Toulumne River, where warm summer days can be spent wading and fly fishing in the refreshing waters. Recreation Nearby trails include the Carlon Falls Trail near the Carlon Day Use Area, and Yosemite National Park trails accessible from Hetch Hetchy. The Middle Fork Toulumne River is a popular spot for swimming, wading and rainbow trout fishing. Facilities The campground offers single and double-family sites, many of which are accessible. Picnic tables and campfire rings are provided, as are accessible vault toilets and drinking water. Roads and parking spurs are paved. Firewood is available for a fee. Natural Features Some sites overlook the river and others are tucked among cedar and ponderosa pine trees. The Tuolumne River runs for about 150 miles from the central Sierra Nevada to the San Joaquin River. Contact Info For facility specific information, please call (801) 226-3564. Nearby Attractions Take a scenic drive through Yosemite to explore its legendary landscapes.
Around this stay
Nearest surrounding services and recreation within ~25 mi — not on-site amenities.
- 4.3 mi
fuel station
Valero
- 1.9 mi
potable water
Potable water
- 0.7 mi
trailhead
Carlon Falls Trailhead
- 4.0 mi
attraction
Interpretive Center
- 0.8 mi
recreation site
Carlon Day Use
No dump station found within ~25 mi. Plan dump access before you arrive.
Contact & access
- 34660 EVERGREEN ROAD · GROVELAND, CA 95321
- 209-379-2258
Reservations & demand
October weekends are typically reserved about 84 days ahead.
Based on 37 Recreation.gov reservations (Oct 2023–Sep 2024). Historical demand — not live availability.
Outbound provider links only. Roam Atlas does not book sites or show live availability.
Source and verification
Last verified: 10/5/2026
See the Sources tab for provenance detail.