A Up to 8 miles maximum round trip with elevation gain up to 1200 feet
B 8-12 miles maximum round trip with elevation gain of 1200 to 2500 feet
C 12-15 miles maximum round trip, and/or elevation gain of over 2500 feet. Steep or rough terrain may be encountered
D More than 15 miles round trip, and/or elevation gain over 3500 feet. Trips in this classification may require additional climbing skills
E Designates peaks of any classification as dangerous. Basic mountaineering skills and/or the approval of the leader will be required
Some hikes will not exactly fit these ratings and may be designated A/B or B/C, etc. to convey the real nature of the hike. In those instances, pay close attention to the stated distance and/or elevation gain and discuss with the hike leaders when you call them to arrange to join the hike.