8th Annual Bigfork River Run/Walk 5K…July 22rd. This event is the sole fundraiser for the Bigfork High School Cross Country team. Cost: 13 and older = $17.00, 6 - 12 = $12.00, 5 and under race free (no t-shirt included). Add $3 for race day registration. Racers will run along the beautiful and scenic Swan River Trail.