Beautiful hike! The loop seems to actually be an access road where the trail goes closer to the lake, so we stayed on the out and back Tahoe Rim Trail and tracked ourselves a couple of times on the downloaded map. That made it about 15 miles... which was really ambitious since my biggest hike before yesterday was 10 miles. That being said, the incline is very gradual, and other than a couple of rocky patches the trail is very clear, bouncy, and soft dirt. Its worth it right before you hit the end to actually summit Mount Baldy on your left. The views of the lake and mountains around you are stunning. It took us 6 hours to do it in full with a decent break for lunch. Definitely would do it in full if you’re confident you can hike that long.... but if not, the views halfway up are stunning, too! And get there before 10am. There are only about 20 parking spots.