Mill Creek Canyon offers good intermediate-to-advanced skiing. Much of the skiing can be accessed from Mill Creek Canyon itself, although some of the upper elevation terrain is easier to access from Big Cottonwood Canyon or Park City's Canyons Village.
Unlike Big and Little Cottonwood canyons, dogs are allowed in Mill Creek Canyon. They can be off-leash on odd numbered days although they must always be leashed in parking and picnic areas. It should go without saying, but cleaning up after your pet means picking up your dog's waste and packing it out. Leaving baggies on the trail, or flicking the waste off the trail to await the spring thaw, is poor form.
Mill Creek Canyon is a short drive from the Salt Lake valley. Simply head east from the intersection of 3800 South and Wasatch Blvd (two traffic lights north of the Olympus Cove shopping center). There is a Forest Service entrance booth a half mile up 3800 South. A modest user fee is charged when you leave the canyon. If you visit Mill Creek more than a dozen times a year, you should consider buying an annual pass. Mill Creek Canyon is part of the Wasatch-Cache National Forest.