Water Lily Lake is a 2 mile out and back trail located near Roosevelt, UT and is rated as moderate. The trail is primarily used for hiking and is accessible from July until August.
From Heber City, take US Highway 40 east 69 miles to Duchesne. Then tate SR 87 north 14 miles to Mountain Home. Follow Moon Lake Road north 4 miles to where Yellowstone River Road Intersects on the east side. From this point, follow Yellowstone River Road another 4 miles to Hell's Canyon Road. Stay on Yellowstone River Road another 6 miles to the Swift Creek trail-head.
Don't let the two miles fool you. This trail is more hard than moderate. Take plenty of water. We had to take several breaks but our younger children did make it. Just about the point I was sure we weren't on the right trail I saw some hikers coming down and the lake was just beyond the trees.