portal creek (pretty fucking gnar though). if you drive up the canyon towards big sky, it's just after the green bridge a ways. on the left, you'll drive like 9 miles or so up the dirt road following the trail sign to 'hidden lakes'. you can unload in the parking lot, i'd go ride with ya man but i took my bike back to helena to store it for the winter. it's a gnarly ass ride over rocks, through little streams and some big hill climbs but once you get to the lakes its fucking sick.