Dimond O
Stanislaus National Forest — riverside, fishing, hiking
Location: GROVELAND, CA, CA
Price: From $38 per night
Price range: $38–$76 per night
Rating: 4.6 out of 5 (256 reviews)
Season: May through October
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.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.
Cell coverage (FCC estimate): weak signal. Actual signal may vary in remote areas. Best carrier: Verizon. Verizon 4G: 100%. AT&T 4G: 0%. T-Mobile 4G: 0%.
Amenities: Fire Rings, Picnic Tables, Vault Toilets, Drinking Water, Fishing, Firewood for Sale
Availability alerts: Set a free cancellation alert at camperwatch.org/campground/dimond-o to be notified when sites open up.
Dimond O is ideally positioned closest to Yosemite's Big Oak Flat entrance and Hetch Hetchy, nestled on the scenic Middle Fork Toulumne River with excellent opportunities for fishing, swimming, and wading. Campers praise the quiet atmosphere, level paved sites with tent platforms, and friendly hosts.
Wildlife alert: Spotted Bat, Bobcat, Striped Skunk, Red-tailed Hawk, Pileated Woodpecker, and Yellow-rumped Warbler present in the area
Insider tips for Dimond O: Book early—this is a popular federal campground with only 26 sites Request a site near the stream for ambient water sounds Road to campground has rough sections with large potholes; drive cautiously RV-friendly alternative to Hodgdon with level paved spaces
Skip Dimond O if: You need RV hookups—none are available. You require year-round access—seasonal May through October only. You prefer developed facilities—amenities limited to vault toilets and drinking water.
Best time to visit Dimond O: May through October — Official operating season for the campground.
Nearby campgrounds: Hodgdon Meadow Campground (Yosemite National Park, CA (Big Oak Flat Entrance)), Crane Flat Campground (Yosemite National Park, CA), Sweetwater (Stanislaus National Forest) (Groveland, CA), Tamarack Flat Campground (Yosemite National Park, CA).
Cell Phone Coverage at Dimond O
Cell signal at Dimond O (GROVELAND, CA): weak overall signal based on FCC broadband data. Best carrier: Verizon.
- Verizon 4G LTE: 100% coverage
Coverage data source: FCC Broadband Data Collection (BDC). Actual signal may vary due to terrain, tree cover, and distance from towers. Camper reports are more reliable than coverage maps in remote areas.
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.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.
Verified facts
RIDB / Recreation.gov official databaseAmenities
RIDB /facilities /campsites · owner-verifiedStraight talk
CamperWatch intel · curated from camper reportsKnown issues, each with the workaround. Read before you book.
Insider tips & when to go
CamperWatch intel · hand-curated entryBook early
this is a popular federal campground with only 26 sites
Request a site near the stream for ambient water sounds
Road to campground has rough sections with large potholes; drive cautiously
RV-friendly alternative to Hodgdon with level paved spaces
Official operating season for the campground
Things to do nearby
RIDB /activities /recareas + intelConditions today
LiveCell signal
FCC BDC · quarterly datasetFCC maps are theoretical — camper reports confirm signal. Best carrier: Verizon.
Wildlife nearby
iNaturalist · research-grade · 8 kmLocation
Leaflet · OpenStreetMap tiles
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.
Campground entrance
Google Maps APICommunity
#community · posts, photos & Q&A · AI-moderated (Claude Vision)Pro tips
- Book on recreation.gov exactly 6 months ahead at 10am ET — Stanislaus National Forest fills fast in peak season.
- Check current road conditions at Stanislaus National Forest before arrival — seasonal closures common.
Frequently asked questions
RIDB facts + intel · FAQPage schema, speakableHow much does Dimond O cost per night?+
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Official resources
●Data sources on this page
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