Park just down from Horsetail Falls (toward Valdez) off the Richardson Highway at the bottom of Mud Slide.
Mud Slide is an ice climbing route rated WI3 located in Keystone Canyon. It's not one of the most impressive climbs in the canyon but is good if you're looking to mix things up a little.
First Ascent: December 1979, by Rick Parks & Andrew Embick.
Angel, Bridal Veil Falls (Ice Climb), Cidersicle, Fang Gully, Flying Cloud, Foolagain, Glass Onion, Greensteps, Hanging Tree Left, Hanging Tree Right, Horsetail Falls (Ice Climb), Hung Jury, Mud Slide, Oil Slick, Popsicle Pillar, POS, Simple Twist of Fate, Spring Loaded, The Bight,