After a mile, cross two small streams before turning right for the half mile stretch to Riddle Lake. At the northwest edge of the lake, continue along the shoreline for another half mile to the larger beach area—views of the Red Mountains and 10,305-foot Mount Sheridan rise up behind the lake. Relax in the warmth of the black sand or on the log bench near the trees. Follow the same route back to your car.
Note: This trail is closed from April 30 through July 14.
MORE PARK INFO: Yellowstone National Park, (307) 344-7381; nps.gov/yell/.
-Mapped by Jeff Chow
Trailhead: From West Thumb, head southwest on Grand Loop Rd./US 14/US 16/US 20. In 0.2 mile, turn left onto S Entrance Rd./John D Rockefeller Jr. Rd. Go 4.1 miles to trailhead parking on the left.