Boulder Lake Boulder Lake is a popular destination for fisherman. To get to the trail, park you car below Boulder Meadows Reservoir. The trail goes along the north side of Boulder Meadows Reservoir. The trail is two miles long with an elevation gain of about 700 feet. The trail climbs slowly until just before the lake, where you follow a few steep switchbacks among the rocks.
Boulder is a good fishing lake, shaped like a figure-eight.
To reach the trail head at Kennally Creek Campground, turn east off Idaho 55 onto the graveled and dirt Paddy Flat Road. Drive 14 miles to the campground. The beginning of this trail borders Kennally Creek as it froths over granite boulders. In slightly less than a mile, the trail crosses the North Fork of Kennally Creek on a wooden bridge. At 2.5 miles, the trail crosses a creek.