Brown Mountain Tr1005 is a nice loop ride around and through the Brown Mountain lava flows, near the Lake of the Woods resort.
Combine with High Lakes Tr6200 for a fast afternoon ride.
Also check out Rye Spur Tr3771.
The non-wilderness portion of Mountain Lakes Tr3721 is covered on the High Lakes Tr6200 page.
Not drawn on the topo map, FR3640 and FR3705 provide southern access, and the area south of Brown Mountain Tr1005 is perfect for cross country skiing, in addition to trails near the Lake of the Woods resort.
The area doesn't have enough elevation change to create truly epic rides, but the clustering of several good rides near a resort area makes this one of the best Southern Oregon mountain bike destinations.
Brown Mtn Trail 1005, High Lakes Trail 6200, Lollipop Loop Trail 45468
Aspen Point Campground, Doe Point Campground, Fish Lake Campground, North Fork Campground
Ranking consistently applied to all of the listed trails.