The Mount Washington Cog Railway is the world's first mountain-climbing cog railway (rack-and-pinion railway).
It is the second steepest rack railway in the world after the Pilatus railway, with an average grade of over 25% and a maximum grade of 37.41%. The railway is approximately 3 miles (4.8 km) long and ascends Mt. Washington's western slope beginning at an elevation of approximately 2,700 feet (820 m) above sea level and ending just short of the mountain's summit peak of 6,288 feet (1,917 m). The train ascends the mountain at 2.8 miles per hour (4.5 km/h) and descends at 4.6 mph (7.4 km/h). It takes approximately 65 minutes to ascend and 40 minutes to descend although the diesel can go up in as little as 37 minutes.
Most of the Mount Washington Cog Railway is in Thompson and Meserve's Purchase, with the part of the railway nearest to Mt. Washington's summit being in Sargent's Purchase.
