WorldwideUnited StatesVirginiaFairfax CountyDifficult Run TrailWorldwideUnited StatesVirginiaFairfax CountyDifficult Run TrailCycling Climbs in Difficult Run Trail There are 4 cycling climbs in Difficult Run Trail.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.Difficult Run To Top0.58 km10.3%60 mN/A2.Ridge Climb0.55 km7.2%40 mN/A3.Ridge Trail1.31 km2.6%34 mN/A4.Difficult Run-Potomac Climb0.27 km10.7%29 mN/A