The northern part of the range, north of Mount Rainier, is known as the North Cascades in the United States but is formally named the Cascade Mountains north of the CanadaâUnited States border, reaching to the northern extremity of the Cascades at Lytton Mountain.
The perimeter of Washington Park in Denver, CO is about 2.60 miles.
Oh well. They left behind a cool little piece of Arizona history that can be reached with a bit of sweat. Railroad Tunnel Trail, a spur of the 2.2-mile Col. Devin Trail between Washington Park at the base of the rim and Rim Road atop it, will get you there. I was running the Highline Trail in 2013 when I took a wrong turn onto Col. Devin Trail and just kept going until I reached the top of the rim.