South Fork / Archuleta Lake Semiloop Professional Review and Guide
"Hike this semiloop, and you’ll find scenic lakes and solitude. Note, however, that the South Fork Trail is very difficult to follow. There are many downed trees, and often the trail just disappears: Carry and know how to use a map and compass and/or GPS. The first 3 miles or so make this a wonderful day hike.
You may not camp—or picket, hobble, tether, or graze pack or riding stock—within 200 feet of Archuleta Lake. Campfires are also prohibited. High-creek crossings are possible, especially early in the season. This hike is strenuous due to length and elevation gain of nearly 3,000 feet; moderate if you cover only the first 3 miles as a day hike."