Devil's Thumb Pass from the Hessie Trailhead The hike to Devil's Thumb Lake is a wonderful hike for those who are able to make the journey. Although there are other, much shorter routes to the pass, none offer the scenery that you will encounter on this particular route. It is rated as moderate due to the length of the hike and the fact that you will ascend approx. 2400 feet (add another 800ft if you choose to climb to the top of the pass). I've also rated this as a full day hike as you will definately want to take your time so you don't miss any of the wonderful sights this trail has to offer. Bring your camera, an extra battery, and several memory cards (extra film if you still use film) as there will be plenty to take pictures of.