WorldwideUnited StatesWyomingNatrona CountyMillsWorldwideUnited StatesWyomingNatrona CountyMillsCycling Climbs in Mills There are 2 cycling climbs in Mills.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.Salt Creek Hill to 26 Bypass1.94 km3.1%60 mN/A2.Poison Spider Hill Sprint0.54 km2.5%13 mN/A