Glen Canyon National Recreation Area - http://www.nps.gov/glca
Glen Canyon National Recreation Area (NRA) offers unparalleled opportunities for water-based & backcountry recreation. The recreation area stretches for hundreds of miles from Lees Ferry in Arizona to the Orange Cliffs of southern Utah, encompassing scenic vistas, geologic wonders, and a panorama of human history. Additionally, the controversy surrounding the construction of Glen Canyon Dam and the creation of Lake Powell contributed to the birth of the modern day environmental movement. The park offers opportunities for boating, fishing, swimming, backcountry hiking and four-wheel drive trips.
[editor's note - Edward Abbey STILL hates the dam that created this park unit...]