I observed the Southwest portion of the GUR skate trail being wrecked by 3 uncaring nimrods trekking right down the middle of it, pulling sleds and carrying equipment. One item on the sled was a propane tank. Where they were going or doing at dusk, I didn’t care to ask. They park at the Chickadee trail. Have observed them twice now. Tried to contact Park office , but no one was around.