Stephen Oliver's Mile High Karate. Providing Martial Arts and Karate Lessons for Adults and Children in the Denver / Boulder Metro Area Since 1983. Serving Littleton, Englewood, Highlands Ranch, Aurora, Lakewood, South Jefferson County, Parker, Castlerock, Denver, Arvada, Westminster, Broomfield, Lafayette, Northglenn, Thornton, Boulder, and Louisville, Colorado. It s amazing, but true I ...