I love the Challis NF! It’s been spared all of the access roads you see in SW Idaho. I was not far west of your adventure this August coming down from summiting Mt. Borah, took an ungainly fall on the trail below treeline, and saw a big four-point muley laughing at me. Seriously thinking of heading back there, rucking up to about 10 k before dawn, and seeing what the flatlanders scare up. The Lost River range has the steepest mountains in Idaho and not for the faint of heart – anyone reading this, bring trekking poles if you’re planning on braving those high-gradient mountains.