I've been there 3 times, Nov guided, Apr guided and Oct walk in. The nymph fishing is awsome there. Make sure you take a guide up river the scenery is spectacular just like fishing in a mini grand canyon. The guide service was great out of Marble Canyon. The fishing in the walk in section was good also and free. Micro egg, pink scuds, san juan worms and tiger midge patterns were the go to flies. The night life there at Marble Canyon Lodge is non existent. Nothing around for miles. The water coming out of the dam is really cold so make sure you wear some warm socks and some good thermals even if the weather warms up. Have a great trip I did.