Duncan Reservoir   Be the first to submit input for Duncan Reservoir. If you have info on Duncan Reservoir, Southern Cascade Range, Modoc County, California please submit it here to improve this web site.          These outdoors activities are available near Duncan Reservoir.   Public Lands Near Duncan Reservoir: Modoc National Forest, California, 14 miles away Ahjumawi Lava Springs State Park, California, 40 miles away Lava Beds National Monument, Tulelake - CA, 43 miles away   Camp Grounds Near Duncan Reservoir: Howards Gulch Campground, Modoc County, 3 miles away Belly Acres Campground, Canby, 8 miles away   Hotels Near Duncan Reservoir: Super 8 Alturas, Alturas, 28 miles away Best Western Trailside Inn, Alturas, 28 miles away   Ski Areas Near Duncan Reservoir: Warner Canyon, Oregon, 58 miles away       730 foot drop, 1 lifts, 14 runs Mount Shasta, California, 88 miles away       1390 foot drop, 5 lifts, 32 runs