This is a small Provincial Park. There are numerous well established singletrack trails. Some are for hikers only, but most are multi use. Trail maps and a description of the park are available on www.friendsofshorthillspark.ca. This is pretty much the best mountain biking in Niagara. There is no cost to enter the park but it is sporatically patrolled by wardens who will give you a ticket for riding on the hiking only trails. The trails are fairly well marked and there is a map at the entrance. If you are in the area and need a bike shop, Rapid City Cycle is a great shop in downtown St. Catharines.