WorldwideUnited StatesIdahoBoundary CountyPorthillWorldwideUnited StatesIdahoBoundary CountyPorthillCycling Climbs in Porthill There are 3 cycling climbs in Porthill.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.Porthill border climb6.5 km2%132 mCat. 42.Up past the dump station3.47 km1.4%47 mN/A3.Copeland to Tanager on Hwy 15.54 km0.3%14 mN/A