Granite Lake and Hidden Lake Trail is an easy hike passing 3 Lakes (Silver Lake, Amy Lake, Granite Lake) about 1 hr from Folsom, CA.
Take the road to Kit Carson Lodge. When the road turns to dirt, take this one-lane dirt road as far as you can go. The road terminates into a round parking area, however, as of the writing of this post, there was a large tree blocking the road about 250 ft before the end.
The Trailhead is clearly marked just before the parking area. From this jump-off point, you can go to Amy lake, Granite Lake, and Hidden Lake. Granite Lake is a quick 1.5 miles. Numerous lodges dot the beginning of the trail. In some sections, the trail can become momentarily unclear, just look for human markers (e.g. cut trees, stacked rocks, rock arrangements, noticeable trail work, footprints, etc.)