This is the northeast trailhead for the hike to Heart Lake and Thimbleberry Lake. There is a minor river ford between Heart Lake and this trailhead that isn't much fun with a bike, so if you're planning to ride out and back from one trail, that's best done from the south trailhead. That way, even if the river feels impassable, you still get to see both lakes before turning back. Alternatively, you can also make a loop by walking Sawmill Creek Road.