Locations: Campsite N 40° 48.665 W 112° 31.280
Outcropping Petroglyphs N 40° 47.324 W 112° 28.819
Boulder Petroglyphs N 40° 48.256 W 112° 28.412
Time Needed: 3 hours to hike to the petroglyphs
Kid Friendly: Probably not. Too many bugs, & pretty much no shade.
Additional Info: Take Exit 84 and turn North from I-80. Then pretty much follow the signs to the island. It's more of a peninsula right now because the lake generally isn't high enough to turn it back into an island.