September 1–3: Wilmington Mountain Bike Festival. Demos and group rides, plus on-site camping, music and local food and beer. Benefits Barkeater Trails Alliance. Register in advance. (518) 946-2683. www.wilmingtonmtbfestival.com
September 7–10: Old Forge Marathon Weekend. Ultra, full or half marathon, plus 10K, 5K, ADKrazy (5K, 10K, full and half marathons over three days), Loony Challenge (10K and half marathon over two days), Ky-Tri (kayak, run, bike) and 20-or 32-mile Old Forge Gravel Grinders. (315) 369-6983. Register at runsignup.com/oldforge
September 8–10: Otis Mountain Get Down (pictured above right). Campout with quirky music and art on a ski hill surrounded by hiking and mountain-biking trails. Otis Mountain, Elizabethtown. Friday, 2 p.m.; Saturday, 9 a.m. otismountain.com
September 15–17: Lake George Jazz Weekend. Contemporary jazz festival featuring international artists. Shepard Park, Lake George. See…