CALIFORNIA LAKES Rock Island Lake Tuolumne County, CA BE THE FIRST TO WRITE A REVIEW SHARE THIS PAGE Rock Island Lake is located in Tuolumne County, California. This lake is 35 acres in size. BUY A CALIFORNIA FISHING LICENSE. SIZE 35 acres ELEVATION 2,997 ft POST A FISHING REPORT BAROMETRICPRESSURE WEATHERINFO WIND MAP& FORECAST SUN/MOONINFO
