Start at the Lafayette Reservoir for easy hikes, fishing access, and parking areas that handle vehicles and trailers for day stops. For panoramic views and more rugged trails, Mount Diablo State Park offers summit drives, multiple trailheads, and campgrounds reachable via paved roads off Highway 24, with ample parking near trailheads. Scenic drives along Highway 24 provide quick access to ridge-top overlooks and picnic pullouts where you can unhitch for a short walk without hauling your whole rig. Each of these options pairs well with a trailer because they balance easy vehicle access, secure parking, and plenty of outdoor activity options.