The old Boise Trail passed between the two points marked ""X"". Hells Canyon is behind or west of this mountain. A little to the north and east is ""Dry Diggings"" where much gold was found and ""picked up"" as there was no water for the usual type...
Blueprint. Inset: Map showing routes to Thunder Mountain. Scale [1:1,647,360]. "Thunder Mountain gold fields are reached only via Boise, Ketchum, Mackay, Red Rock or Weiser, all good outfitting points on the Oregon Short Line R.R."