Well...I guess that depends on the mud. And this is after quite a bit of washing!
Here's another shot of the Dream Team at the bottom of Picture rock. IMO, linking Heil to Wild Turkey to Picture rock is the best sustained singletrack ride in Boulder (well, the best legal one, anyway). ~10 miles of absolutely stunning moderately technical flowy singletrack, relatively close to town, with the option to add on Hall Ranch (another 10 miles of good trail) with only about 1 mile of spinning on the pavement.