Trail 784, Suiattle River Trail Trail 791, Gamma Ridge Route beta and trip reports https://www.mountainzone.com/map/gamma-hot-springs-near-glacier-peak-washington/ https://www.wta.org/go-hiking/hikes/gamma-ridge https://www.wta.org/go-hiking/trip-reports/trip_report.2015-07-07.7909269972 https://cascadeclimbers.com/forum/topic/98120-tr-gamma-peak-backpack-gamma-ridge-942015/?tab=comments#comment-1134927 http://www.nwhikers.net/forums/viewtopic.php?t=8017081 http://www.communitywalk.com/location/gamma_hot_springs_140f/info/10954 Some data from Caltopo map QC2T