U.S. Forest Service · Stanislaus National Forest · Groveland, CA

Dimond O

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.

Closed for the seasonReservable · Recreation.gov26 sites48 ft maxNo hookupsPets okFires ok

More like this: reservable in California · big rigs in California · pets allowed in California

Check availability on Recreation.gov ↗
Dimond O Camprground EntranceDIMOND ODIMOND ODIMOND O
Photos courtesy of USDA Forest Service, Stanislaus NF · Recreation.gov
1fire
active
Dome · 22 mi away · 6,788 acres
Interagency incident data as of 2026-10-16
Incident details ↓

Site mix

Standard, no hookups22
Tent-only4
Most sites here open on Recreation.gov six months ahead, at 10 a.m. Eastern. Sold out is not final: cancellations come back into the pool, most of them two to three days out. How to catch one

Site guide

Will my RV fit

The longest site here provides 48 feet of vehicle capacity. Most sites are shorter.

Have the trailer VIN? It carries the trailer length.

26 sites in 2 loops. Tap a filter to narrow the list; the map follows.

SiteLoopTypeEntryFits, ftSurfaceShadeWaterfrontPeople / vehiclesFires
005LowerTent onlyBack-in25PavedPartialRiverfront6 / 1Yes
006LowerStandardBack-in22PavedPartialRiverfront6 / 1Yes
007LowerStandardBack-in36PavedPartialRiverfront6 / 1Yes
008LowerTent onlyPull-through50PavedFullRiverfront6 / 1Yes
009LowerStandardBack-in22PavedFullRiverfront6 / 1Yes
030LowerStandardBack-in40PavedFullRiverfront6 / 1Yes
031LowerStandardBack-in38PavedPartialRiverfront6 / 1Yes
032LowerStandardBack-in38PavedFullRiverfront6 / 1Yes
033LowerStandardBack-in40PavedPartialRiverfront6 / 1Yes
038LowerTent onlyBack-in45PavedRiverfront6 / 1Yes

Per-site records as published by the managing agency on Recreation.gov. Blank cells mean the agency listed nothing for that site. Check-in 2:00 PM, checkout 11:00 AM.

Amenities & rules

HookupsNone
Max vehicle length48 ft
EquipmentRVs & trailers, Tents
PetsAllowed
CampfiresAllowed, subject to restrictions
Tent padsYes

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.

Individual sites vary. Confirm on Recreation.gov or with the managing office.

Season & status

StatusClosed for the season. Forest Service sites close for the season; check the official page for the reopening date.
SeasonMay to September
ForestStanislaus National Forest
BookingFor reservations, visit www.recreation.gov or call 1 (877) 444-6777; TDD: 1877-833-6777.
FeesAmerican Land & Leisure operates the Dimond O Campground and charges the following fees: $33.00 for a single-family site. $66.00 for a double-family site. American Land & Leisure operates this campground under a special use permit administered by the Forest Service.
RulesCamp in designated sites only. The number of people allowed in a single campsite is 6. The maximum length of stay in any campground is 14 days. Campfire permits are not required in developed campgrounds. Do not burn plastic or metal. Please leave the area in as good (or better) condition than you found it.

Stanislaus National Forest recreation page ↗

Weather by month

NOAA climate normals →
Weather by month near Dimond O30°40°50°60°70°January: 6.86 inches of precipitationFebruary: 5.63 inches of precipitationMarch: 5.81 inches of precipitationApril: 3.68 inches of precipitationMay: 2.40 inches of precipitationJune: 0.76 inches of precipitationJuly: 0.29 inches of precipitationAugust: 0.05 inches of precipitationSeptember: 0.66 inches of precipitationOctober: 2.28 inches of precipitationNovember: 4.37 inches of precipitationDecember: 7.65 inches of precipitationJanFebMarAprMayJunJulAugSepOctNovDecJanuary: 37.8°F averageFebruary: 36.2°F averageMarch: 38.3°F averageApril: 42.2°F averageMay: 50.2°F averageJune: 59.5°F averageJuly: 67.5°F averageAugust: 67.0°F averageSeptember: 62.2°F averageOctober: 53.0°F averageNovember: 43.2°F averageDecember: 37.4°F average0 in2 in4 in6 in8 inTemp °FInches
The line is the average temperature and the bars are average precipitation at Yosemite Village 12 W, 5 miles from the campground at 6,620 feet, station USW00053150 in the NOAA monthly climate normals for 1991 to 2020. Precipitation totals about 40 inches a year.

Getting there

From the Groveland District Office, head east 15 miles on Highway 120, then turn left on Evergreen Road and travel 4 miles. The campground is located on the left.

Nearest townGroveland, California
Coordinates37.8250° N, 119.8611° W · Directions ↗

Fire nearby

  • Wildfire
    Dome

    22 mi from the campground · 6,788 acres · 95% contained

Distance is to the reported incident point, not the fire edge. Call the managing office before you drive.

Supplies & services

Outdoor gearMountain Shop & Mountaineering School ↗17 mi
Dump stationDump station ↗17.2 mi
RV sales & serviceDenis RV Center ↗59.4 mi

Locations © OpenStreetMap contributors. Call ahead; hours change seasonally.

Explore

Video

Dimond O Campground - Stanislaus National Forest, CA

Worth a stop

Take a scenic drive through Yosemite to explore its legendary landscapes.

Trails nearby

Forest Service trail data →
  • 0.7 mi
    Carlon Campground
    0.1 mi trail · hiking, horse, bike
  • 2.7 mi
    Diamond O
    0.1 mi trail · hiking, horse, bike
  • 4.1 mi
    Mather
    1.3 mi trail · hiking, horse, bike
  • 4.3 mi
    Preston Falls
    4 mi trail · hiking, horse, bike
  • 4.7 mi
    Spur From 19e58
    0.9 mi trail · hiking, horse, bike

Trail and trailhead records are the Forest Service's. Distances are straight-line to the nearer trail end. Trail conditions are not tracked here.

Public land it sits in

On Wilderness Atlas →

This campground sits inside Yosemite Wilderness.

Each unit is published as a centre point and an acreage rather than a boundary, so this section stands it in for a circle of the same area. Whether a campground is inside, and how far it is from one it is outside, are both approximate.

On the National Register nearby

On Register Atlas →

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.

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.

Guidebooks for California

We earn a small commission if you buy through these links. It does not change what we list.

Titles come from Open Library's catalog, matched by subject heading or by title.

Reference

Questions people ask

Do I need a reservation at Dimond O?

Sites at Dimond O are reservable on Recreation.gov. For reservations, visit www.recreation.gov or call 1 (877) 444-6777; TDD: 1877-833-6777. Any walk-up sites are listed on the booking page.

Source: Recreation.gov

How much does it cost to camp at Dimond O?

American Land & Leisure operates the Dimond O Campground and charges the following fees: $33.00 for a single-family site. $66.00 for a double-family site. American Land & Leisure operates this campground under a special use permit administered by the Forest Service.

Source: Recreation.gov

What time is check-in at Dimond O?

Check-in 2:00 PM, checkout 11:00 AM.

Source: Recreation.gov

Is Dimond O open right now?

Closed for the season as of Oct 16, 2026. Season May to September.

Source: Forest Service status

How many sites does Dimond O have?

26 sites, including 22 standard sites without power and 4 tent-only sites.

Source: Recreation.gov

Will my RV fit at Dimond O?

The longest site here provides 48 feet of vehicle capacity. Most sites are shorter. The sidebar tool checks a trailer or motorhome length against every site.

Source: Will my RV fit

Are pets allowed at Dimond O?

Yes, pets are allowed at Dimond O. Leash rules apply.

Source: Recreation.gov

Can I have a campfire at Dimond O?

Fires are allowed in the provided rings under normal conditions. As of 2026-10-16, there is 1 active fire within 50 miles, so check current restrictions before you light one. Camp in designated sites only.

Source: Fire nearby

Is there cell service at Dimond O?

FCC coverage maps show Verizon 4G LTE at the campground point. Terrain changes that from one site to the next.

Source: FCC Broadband Map

What is there to do at Dimond O?

Nearby trails include the Carlon Falls Trail near the Carlon Day Use Area, and Yosemite National Park trails accessible from Hetch Hetchy. The Recreation section on this page has the rest.

Source: Recreation

What is the nearest town to Dimond O?

Groveland, California. Take a scenic drive through Yosemite to explore its legendary landscapes.

Source: Getting there

What if Dimond O is full?

The nearest public campgrounds are Hodgdon Meadow Campground (1.8 mi), Crane Flat Campground (4.3 mi), and Sweetwater (7.8 mi).

Source: Campgrounds nearby