flows S from Twelvemile Mtn. to Middle Fork Koyukuk River, 23 mi. S of Wiseman, Brooks Range
This stream was reported as Branson Creek in 1899 by T. G. Gerdine, U.S. Geological Survey (USGS), but in 1956 U.S. Geological Survey (USGS) reported "Mailbox Creek" to be local usage.
Gold Bench Placer Mine, Ironsides Bar Mine,
Mountains:Streams:Bear Creek, Chapman Creek, Davis Creek, Eagle Creek, Grayling Creek, John R Creek, Lower Fork Twelvemile Creek, Mailbox Creek, Porcupine Creek, Quartz Creek, Rock Creek, Rosie Creek, Smally Creek, Twelvemile Creek, Upper Fork Twelvemile Creek,