Smiths Falls-Montague (Russ Beach) Airport (IATA: YSH, ICAO: CYSH) is a registered aerodrome located about 3.5 nautical miles (6.5 km; 4.0 mi) east of the town of Smiths Falls, Ontario, Canada.

The airport is operated by the Smiths Falls Flying Club, and is registered with Transport Canada. The Smiths Falls Flying Club operates a flight training unit with three Cessna 172 airplanes, and there is 100LL avgas available 24 hours via a self-serve credit card system. There are no landing, ramp or tie-down fees. Surface level aerobatics are frequently conducted over the paved runway 06/24.

• Magnetic variation: 14° west

• Runway 06/24: 3,998 ft × 75 ft (1,219 m × 23 m), paved, lighted (ARCAL 122.9 MHz), abbreviated PAPI approach lighting at both ends

• UNICOM/ATF: Smiths Falls Unicom/Traffic, 122.7 MHz

• List of airports in the Ottawa area

• Official website