Whitehorse Fifteen Mile, or Trout Creek Road, is an access trail into the Trout Creek Mountains running between the Willow Creek Wilderness Study Area and Fifteen Mile Wilderness Study Area. Accessing this rugged terrain depends on the season, requiring a high-clearance vehicle and dry conditions, typically after mid-May when the snow has melted. There are no noticeable campsites off this road, but this road also provides primary access to the iconic Willow Creek Hot Springs Campground, which offers excellent dispersed camping choices.