Started at Big Water lower parking lot and ran up to Dog Lake, then looped to Desolation Lake then back along the Great Western trail. This is a great loop which I have done one time before and was thinking it was only 9.5 miles. Psych...it was 12.5. I'm undertrained to push this but was beautiful scenery and bonus was no mountain bikes as it is odd number day. Lots of hikers to Dog lake but no one the middle 8 miles except one lone geezer mountain runner who looked fresh as a daisy and would kick my trash.