Boulder Lake   Be the first to submit input for Boulder Lake. If you have info on Boulder Lake, Custer County, Idaho please submit it here to improve this web site.          These outdoors activities are available near Boulder Lake.   Lakes Near Boulder Lake: Mill Lake, Blaine County, 16 miles away   Public Lands Near Boulder Lake: Challis National Forest, Idaho, 21 miles away Sawtooth National Forest, Idaho, 29 miles away Yankee Fork State Park, Idaho, 34 miles away Hagerman Fossil Beds National Monument, Hagerman - ID, 66 miles away   Camp Grounds Near Boulder Lake: Marshall Creek Campground, Custer County, 9 miles away Holman Creek Campground, Custer County, 10 miles away Lower O'Brien Campground, Custer County, 10 miles away Upper O'brien Campground, Custer County, 10 miles away   Hotels Near Boulder Lake: SnowRun by ResortQuest, Ketchum, 25 miles away Greyhawk by ResortQuest, Ketchum, 25 miles away Knob Hill Inn, Ketchum, 27 miles away Sun Valley Resort, Sun Valley, 27 miles away River Ridge by ResortQuest, Sun Valley, 27 miles away   Ski Areas Near Boulder Lake: Sun Valley, Idaho, 25 miles away       3400 foot drop, 19 lifts, 75 runs Soldier Mountain, Idaho, 34 miles away       1425 foot drop, 3 lifts, 36 runs Lost Trail Powder Mountain, Montana, 91 miles away       1800 foot drop, 8 lifts, 45 runs   Whitewater Near Boulder Lake: Salmon River, CusterCounty, 12 miles away       Class IV - 14 miles long (Sunbeam Dam to Holman Creek) Salmon River, CusterCounty, 15 miles away       Class II-III - 12 miles long (Hellroaring Creek to Redfish Lake Creek) Salmon River - Yankee Fork, CusterCounty, 20 miles away       Class IV-V - 26.8 miles long (Upper road end to Salmon River)