Rideau Valley Air Park (TC LID: CPL3) is a registered aerodrome located 3 nautical miles (5.6 km; 3.5 mi) south of Kars, Ottawa, Ontario, Canada on the shore of the Rideau River.

The aerodrome has a single 1,800 by 100 ft (549 by 30 m) grass runway, and serves mainly ultralight and glider traffic.

[1] Rideau Valley Soaring is a gliding club that operates from the Kars/Rideau Valley Air park on a regular basis during the soaring season (April-October).

The gliding club owns a Grob 103, Schleicher ASK 21 and Schweizer SGS 2-33 training gliders, plus Schweizer 1-34 and Rolladen-Schneider LS4 single-seaters.

The club also has two tow planes, a Bellanca Citabria and a Piper PA-25 Pawnee.