Big Trinity Lake   Be the first to submit input for Big Trinity Lake. If you have info on Big Trinity Lake, Elmore County, Idaho please submit it here to improve this web site.          These outdoors activities are available near Big Trinity Lake.   Lakes Near Big Trinity Lake: Anderson Ranch Reservoir, Elmore County, 13 miles away   Public Lands Near Big Trinity Lake: Three Island Crossing State Park, Idaho, 35 miles away Sawtooth National Forest, Idaho, 39 miles away Hagerman Fossil Beds National Monument, Hagerman - ID, 55 miles away   Marinas On or Near Big Trinity Lake: Fall Creek Resort and Marina, Mountain Home, 7 miles away   Camp Grounds Near Big Trinity Lake: Big Trinity Cabin - Boise National Forest, Boise, 0 miles away Little Trinity Lake Campground, Elmore County, 0 miles away Big Roaring River Lake Campground, Elmore County, 1 miles away Little Roaring River Lake Campground, Elmore County, 1 miles away   Hotels Near Big Trinity Lake: BEST WESTERN Foothills Inn, Mountain Home, 29 miles away Hampton Inn Suites Mountain Home, Mountain Home, 29 miles away   Ski Areas Near Big Trinity Lake: Soldier Mountain, Idaho, 42 miles away       1425 foot drop, 3 lifts, 36 runs Bogus Basin, Idaho, 47 miles away       1800 foot drop, 7 lifts, 52 runs Sun Valley, Idaho, 71 miles away       3400 foot drop, 19 lifts, 75 runs   Whitewater Near Big Trinity Lake: Boise River - South Fork, ElmoreCounty, 13 miles away       Class I-II - 10 miles long (Anderson Ranch Dam to Danskin Bridge) Boise River - North Fork, Boise/ ElmoreCounty, 14 miles away       Class III-IV - 12 miles long (Barber Flat to confluence with Boise River at Troutdale) Boise River, Boise/ ElmoreCounty, 14 miles away       Class I-III - 10 miles long (Troutdale to Willow Creek Campground)