The Troutmap for the San Juan River, covers the river from Navajo Dam to Rainbow Lodge, just south of the town of Navajo Dam. This is Gold Medal fly fishing for medium to large trout. A great wading river, but floating is also possible. Because this is a relatively short stretch of water, the maps are at a larger scale for greater detail over the shorter distance.
Navajo Dam to Rainbow Lodge (3 river maps and an area map)