Campgrounds and RV parks near Modesto, CA

River-based recreation drives most of the camping near Modesto. Caswell Memorial State Park has a swim beach, a slow stretch of the Stanislaus River for tubing and paddling, and shaded nature trails under valley oaks that support endangered riparian wildlife. George J Hatfield State Recreation Area sees families wading and fishing in the Merced River, with rainbow trout and bass in spring and catfish and perch year-round. Turtle Beach RV Resort offers a boat launch and direct San Joaquin River access, making it a common base for anglers. Beyond the campgrounds, Modesto itself sits within roughly 90 minutes of Yosemite National Park and the Sierra Nevada foothills, so many RV trips pair a Central Valley overnight with a day trip east into Gold Country or the high country.

Modesto has a Mediterranean climate with hot, dry summers and mild, wet winters. Spring and fall are the most comfortable times to camp, with daytime highs typically in the 70s F and cool nights. State park campgrounds in the area, including Caswell Memorial and George J Hatfield, are generally open year-round, but summer weekends fill quickly because families come for the rivers to cool off. Summer temperatures regularly push into the mid-90s and occasionally above 100 F from June through September. Shade, electric hookups for air conditioning, and proximity to water become real considerations. Mosquitoes are heavy near the rivers in warmer months, particularly at Caswell and Hatfield, so repellent is essential. Winter brings the rainy season, dense tule fog in the valley, and cool nights that can dip near freezing. Stanislaus River flooding has closed parts of Caswell in past wet winters, and Hatfield has also seen flood-related cleanup, so it is worth checking current park status before booking a winter trip.

Expect a mix of rustic state park camping and full-hookup private RV parks. Caswell Memorial State Park has 64 family sites under dense oak canopy, with picnic tables, camp stoves, food lockers, flush toilets, and coin-operated hot showers, but no hookups and no dump station. Trailers are limited to 21 feet and motorhomes to 24 feet, so larger rigs will not fit. George J Hatfield is more primitive: walk-in tent sites a short distance from the parking area, drinking water, picnic tables, and restrooms, with no hookups. Turtle Beach RV Resort offers 30 and 50 amp hookups, water, sewer, a pool, and a boat launch, though reviewers note an older property with a narrow access road. Cell coverage is generally reliable across the valley, and grocery and fuel stops are close by in Modesto, Ripon, and Manteca.