The northern portion of Long Lake Provincial Park (north of Long Lake itself) and the adjacent Water Commission lands between the park's boundaries and the St. Margaret's Bay Rd. is home to a network of narrow single-track mountain bike trails that is noteworthy for its challenging terrain. Many of the trails are organized into a series of loops (approximately 9.5 kilometers of trail) that can be ridden a number of ways. Most trails are unmarked. Although this area of the park represents a small portion of its total area, it and an adjacent narrow strip of land at the northwest end of the park (which contains a small waterfall and a popular swimming spot) receives over 90% of the park's total usage.