(en) Fred Beckey, Cascade Alpine Guide: Climbing and High Routes: Stevens Pass to Rainy Pass, Seattle, The Mountaineers, , 3e éd., 350 p., poche (ISBN978-0-89886-423-6, LCCN86023899, lire en ligne), p. 221, 360
loc.gov
lccn.loc.gov
(en) Fred Beckey, Cascade Alpine Guide: Climbing and High Routes: Stevens Pass to Rainy Pass, Seattle, The Mountaineers, , 3e éd., 350 p., poche (ISBN978-0-89886-423-6, LCCN86023899, lire en ligne), p. 221, 360
wa.gov
wsdot.wa.gov
(en) North Cascades Highway Dedication Issue, Washington Highways (Washington State Department of Transportation), September 1972, p. 4. Accessed online 12 September 2008.