Dispersed camping near Duvall can be found along the South Fork Snoqualmie River, featuring multiple wooded sites off Tinkham Road. The unpaved access road has potholes requiring decent ground clearance, with sites varying from roadside pull-offs to more secluded spots deeper in the forest. Most sites include established fire rings, but no facilities or drinking water. According to one visitor, "If you get here early enough you can get a good secluded site on an offshoot, but most sites are just right off the road."
Mountain Loop Highway offers additional off-grid options with sites along the river, particularly after the highway transitions to gravel. A review noted, "Meandering sites along the river with good logs for benches and fire rings made from forest rocks. Heavily forested and beautiful." For those willing to hike, Lake Dorothy provides backcountry camping with primitive toilets, while Beckler Creek accommodates tent and RV camping with drive-in access. Most dispersed sites require a Northwest Forest Pass, have seasonal fire restrictions, and follow Leave No Trace principles due to lack of facilities.