Glen Alpine Loop is a 12 mile lightly trafficked loop trail located near South Lake Tahoe, CA that features a lake. The trail is only recommended for very experienced adventurers and primarily used for hiking, trail running, and backpacking.
This is a beautiful hike, but it's rated hard for a reason! Some of the trail markers are different than the names on the trail map so it's easy to lose your way. There are multiple lakes and a couple small waterfalls, even during the summer, and the changes in terrain are amazing, but the last couple miles of the hike are extremely steep and it's easy to lose the trail. I can imagine coming up from that end of the loop would have been even harder. At the very end there's a sign stating that it is not maintained, would have been nice to know. All in all it took us 2.5 hours longer than we expected, accounting for the times we had to turn back after going down incorrect trails. Be sure you leave prepared and give yourself plenty of time! If you do this you will be greatly rewarded. It was absolutely gorgeous and quite a work out. At the end before descending the steepest part of the trail there's a breathtaking view of both Fallen Leaf Lake and South Lake Tahoe. Happy trails!!