WorldwideUnited StatesCaliforniaPlumas CountyPortolaWorldwideUnited StatesCaliforniaPlumas CountyPortolaCycling Climbs in Portola There are 5 cycling climbs in Portola.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.Assault on Lake Davis8.39 km3.8%316 mCat. 32.Lake Davis Road Climb - Charmichael School to Top7.05 km4%284 mCat. 33.A15 to Portola from 8912.4 km1%118 mCat. 44.Clio A-15 Climb2.57 km4.5%117 mCat. 45.Portola Climb2.27 km2%44 mN/A