Snow hardness measurements were collected at camera sites from December 2020 - April 2021, at the same time as snow density. Camera sites were chosen by stratified non-random sampling. Cameras were never closer than 25m to other cameras, nor were they placed facing trails. Measurements were collected every few weeks as logistics allowed. Samples were collected near the camera site in snow visually similar to the snow in the camera viewshed to prevent snow conditions from being disturbed beyond normal camera deployment. Snow hardness was measured using a ram penetrometer or “ramsonde” (Snowmetrics; Fort Collins, CO). A ramsonde is composed of a hammer, anvil, and rod. The hammer is dropped onto the anvil from a known height, and the depth to which the ramsonde penetrates the snow is recorded using gradations on the rod. Drops are performed until the tip of the ramsonde reaches the ground. Based on the weight of the ramsonde, the number of drops, and the height of the drops, a ram resistance value can be calculated, which serves as a proxy for snow hardness. We calculated ram resistance for the individual snow layers in the three hardness samples collected on each sampling occasion.