The ground is public lidar (USGS 3DEP 1 m DEM (1/3 arc-second underneath)); the runs are reproduced from OpenStreetMap, not the resort's own map.
Grades are sampled from the lidar ground along each mapped run.
Compare Otis Ridge with 4 other resorts nearby: runs, lifts and the steepest terrain side by side.
Berkshires ski areas →As an Amazon Associate, SnowSync earns from qualifying purchases. These links open the retailer's site.