North Creek just inside Zion Park
This small, unnamed waterfall is located on North Creek, just inside Zion National Park. Its plunge pool makes a great swimming hole.
From the town of Virgin, drive east on the Kolob Reservoir Road. Shortly after entering the park you'll see the Right Fork Trailhead parking area. Park there and then follow the marked trail down the cliff into the canyon. The trail is steep and rocky and that part of the hike is moderately challenging.
When you reach the creek then just follow it downstream to the waterfall. Return the way you went in. Total roundtrip distance is about 3 miles.