Okanogan National Forest Lake Ann, Heather Pass, Maple Pass Hike Hike #2002 Length: 7 miles round trip Elevation Change: 2800' gain Season: Summer thru fall Difficulty: Very Difficult Permit:   NW Forest Pass Required Features: This is a popular hike that is richly rewarded. The hike takes you past the junction to Lake Ann and up a rigorous climb to Heather and Maple Passes. A Virtual Hike in the Okanogan National Forest All for the love of hiking!