An aerial view shows the Riverwalk winding along the Androscoggin River between Lewiston and Auburn. (Russ Dillingham/Sun Journal)

Corey Morris, of Leeds, right, launches off a jump as another motocross rider, background, flies over another as they get some practice laps in at Hemond's MX & Offroad Park in Minot Thursday afternoon. The track opens this weekend with their Spring Break event, a tuneup where they expect several hundred racers to come out to camp, BBQ and listen to a live band and gear up for next weekend's opening race. (Russ Dillingham/Sun Journal)

Caleb Sargent, 4, of Windham, practices at Hemond's MX & Offroad Park in Minot Thursday afternoon on his motorized balance bike as he prepares to compete in Sunday's race on the newly built track for beginner riders, balance bikes, bicycles, and pit bikes. The facility is open for this weekend's Spring Break event that is expected to draw several hundred riders of various types of motorcycles, ATV's, Jeeps and other motorized vehicles to ride on two championship courses and several other smaller ones as well as 10 miles of trails. (Russ Dillingham/Sun Journal)