In 1973, Mike Farny had a vision: to bring affordable outdoor recreation to the residents of metropolitan Boston. Opening the Charles River Canoe Service that year, Farny became an instrumental voice in efforts to clean up the river, encouraging people to canoe, kayak, and sweep up the dirt on the riverbanks. The next year, he persuaded the Leo J. Martin Golf Course to transform its greens and fairways into a sprawling landscape for cross-country skiing alongside the Charles, allowing the public to enjoy recreation on the river even when its waters had frozen. A 15-kilometer system of trails makes use of natural snowfall and offers skiers a chance to change up their routes. Even when flakes refuse to fall, a state-of-the-art artificial-snow system shoots powder over a 2.5-kilometer loop, which rests beneath lights to allow night skiing before guests return to the cozy snack shop for hot cocoa and a bite to eat.