The Whidbey Island Marathon, Half Marathon, 10k, & 5k in Oak Harbor, WA, offers a marathon, half marathon, 10K, 5K, and 1K kid’s run. The course showcases the beauty and landscapes of Whidbey Island, from coastal shorelines and rolling hills to historic communities and lush forests. Runners will encounter views of Puget Sound, Olympic Mountains, and the Cascades. All events are walker-friendly except for the full marathon.