A portable line ascending device to enable users to ascend an incline on sliding or rolling sporting by travelling up an anchored line with the line ascending device. The device includes a mount, a plurality of sheaves connected to the mount, a motor driving the plurality of sheaves, and a power supply to supply electricity to the motor. The plurality of sheaves are configured to enable a line to be wound around at least a portion of each sheave of the plurality of sheaves and operable to engage the line to pull the line through the plurality of sheaves such that the line ascending device travels along the line.