John Miller of Auburn rides his mountain bike Monday on the Porcupine Trail at the Androscoggin Riverlands State Park in Turner. The park has more than 12 miles of single-track and double-track, multipurpose trails popular with mountain bikers and hikers. The park will host the Riverlands 10K running race Sunday. Go to www.baxteroutdoors.com for information on the race. (Daryn Slover/Sun Journal)