Between the Bluffs Plein Air Festival is an outdoor art festival hosted each year in September in La Crosse, WI. The festival brings artists from the region to La Crosse for two weeks to paint local scenes as part of a competition. At the conclusion of the event an awards ceremony and exhibit is held. You can also enjoy artist demonstrations. Check out their website for details.
Between the Bluffs Plein Air
Want to try your hand at it? Visit their artist page to register to compete.