This is a one trailhead wilderness hiking trail, so in and out is the way to backcountry hike it normally. Mirror Lake Trail is 7 miles long it's an average length backcountry hiking trail. This is a backcountry hiking trail that is quite long, so do pack enough food to last the whole trip. This wilderness hiking trail has a total elevation difference of 605 feet which is lower than average. The time needed for this backcountry hike is roughly 6 hours, but of course some folks walk a bit slower and some a bit faster. At parts of the year this vicinity sees very little rain, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. Mirror Lake Trail stays roughly within the same elevation zone the whole time, so you won’t have to worry about different climate zones along your hike.