We Mountain Biked back Mills Creek today, Perfect weather, cool & sunny. Saw two Black Bears while biking. One very nice one on the road just past the Big Gate. Saw no moose, trail is very difficult, and being 64 years old did not help. Juneau Creek & Mills Creek are low and very crossable, but we pushed the bikes 75% of the time after the first mile. Lovely valley for photographing. Trail was great on foot, but rough to bike.