Post Mountain • best beaches

5 Best Beaches & Waterfront Escapes Near Post Mountain California

Post Mountain might sit deep in the Trinity County woods, but you are never far from a swimmable shoreline. From classic Trinity Lake swim beaches to quiet river sandbars, locals have plenty of ways to cool off when summer hits. These five spots capture the area’s most reliable, scenic, and easy-to-reach stretches of sand and smooth gravel.

 
01

Clark Springs Beach, Trinity Lake

Trinity Lake North Shore • Forest-Framed Reservoir Beach • Local Favorite For All-Day Swimming

A broad, sandy cove on Trinity Lake with gentle water, shaded picnic spots, and enough room for both families and casual swimmers.

Set in a wide cove on the north side of Trinity Lake, Clark Springs offers one of the most comfortable, sandiest shorelines in the region. Families appreciate the mellow, roped swim area, easy lake access for floaties, and towering pines that keep parts of the beach shaded through the afternoon. Arrive earlier on peak summer weekends if you want a shoreline spot close to the water.

02

Tannery Gulch Beach, Trinity Lake

Trinity Lake South Shore • Quiet Lakeside Cove • Great For Picnics And Paddling

Tucked into a smaller arm of Trinity Lake, Tannery Gulch combines a cozy swim beach with calm water that is ideal for kayaks and paddleboards.

Tannery Gulch feels a bit more low key than some of the bigger Trinity Lake access points, which is exactly why locals come here to unwind. The shoreline mixes sand and small pebbles, with plenty of space to spread out a blanket and watch boats slide past in the distance. Bring your own paddleboard or kayak, because the sheltered water here is usually calm and beginner friendly.

03

Fir Cove Swim Beach, Ruth Lake

East Of Post Mountain • Sunny Lakeside Recreation Area • Best For Simple Summer Swimming

A straightforward, sun soaked swim beach on Ruth Lake with easy parking and a laid back day use vibe.

When temperatures spike around Post Mountain, Fir Cove is one of the most reliable spots for a quick escape to the water. The day use area has a friendly, no frills feel, with a compact swim beach, nearby restrooms, and enough shoreline for kids to dig in the sand while adults cool off waist deep. It is an easy choice when you want lake time without overthinking the plan.

04

Big Flat River Beach, Trinity River

Trinity River Along Highway 299 • Gravel Bar River Beach • Great For Hot Afternoons And Short Dips

A roomy gravel bar on the Trinity River where you can spread out a chair, hop between shallow pools, and watch rafters float by.

Big Flat delivers the classic Trinity River experience: clear, cold water sliding past broad gravel bars that feel like natural patios. On warm days, locals set up camp chairs right at the edge of the current and alternate between sunning on the rocks and quick plunges into deeper pockets. The flow can change with the season, so pick your spot carefully, especially if you visit with kids or pets.

05

Junction City River Beach, Trinity River

Near Junction City • Easy-Access Riverside Spot • Best For Road Trip Breaks And Short Swims

A convenient pull off near Junction City that offers a short walk to sandy and pebbly pockets along the Trinity River.

If you are heading toward Weaverville or the coast and just need a fast cool down, the river access near Junction City is tough to beat. Short paths lead from the parking area down to mixed sand and gravel banks where you can wade in ankle deep or find slightly deeper pools for a real plunge. It works well as a quick roadside reset, especially on hot afternoons when the canyon holds the heat.