The San Rafael Swell is a seemingly endless expanse of slickrock, reefs, rivers, narrow canyons, mesas, towers, and pinnacles. It is the wilderness home of coyotes, eagles, mountain lions, and bighorn sheep. Steve Allen s "Canyoneering: The San Rafael Swell" has long been the standard for exploring this remarkable area. With the input of fellow guidebook author Joe Mitchell, "Canyoneering the Northern San Rafael Swell "replaces""the older volume with a completely rewritten and updated text containing more detail, greater accuracy, and a tighter focus on the northern half of the Swell. This is...