Observation Peak Trail has a total elevation difference of 2,662 feet which is higher than average. This is a one trailhead hiking trail, so you're looking at an in and out backcountry trek. Different parts of Observation Peak Trail are at very different elevations, so keep in mind that you may need to dress differently at different elevations. This is a long great outdoors hiking trail, so do pack enough food to last the whole trip. This trek should take you about 2 days, so make sure you've got all your overnight gear packed. Observation Peak Trail is 12.4 miles long; it's a long wilderness trail.