The total elevation difference for Annette Lake Trail is 1,906 feet which is an average number. This wilderness hiking trail has only one trailhead, so you're looking at an in and out backcountry hike. This backcountry trail goes through some very different elevations, so keep in mind that you may need to dress differently at different elevations. With its 4.6 miles of walking distance it's a mid length backcountry trek. This backcountry walk shouldn't take more than 4 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Even though this is not a very long great outdoors trail you should still bring some emergency supplies just in case something happens.