The Deep Creek Mountains are discussed on Pages 353-355 of the book.
The Deep Creek Mountains form a rugged, linear and unbroken escarpment that begins near American Falls and runs south for 30 miles toward Holbrook. The Arbon Valley flanks the range on the east; the Rockland Valley on the west. Deep Creek Peak is the highest point in the range at 8,748 feet. The range includes several long, well-developed canyons, including Big Canyon and Knox Canyon. It is surprising and unfortunate that Teddy Roosevelt and Gifford Pinchot did not include this forested and attractive range in the National Forest System when they hurriedly added public lands to the system just before the presidential power to do so ended. The extensive public land found in the range is administered by the BLM.
The range contains more than 30 ranked summits and good, high access to the peaks located around Deep Creek Peak. Access to other sections of the range is hit or miss due to private property issues. The northern portion of the range is part of the Fort Hall Indian Reservation and the peaks located in the reservation are not open to the public.