Lacking a valid driver’s license, car registration, inspection sticker, or insurance card can get a driver into trouble, as evidenced by two arrests in Sag Harbor this week.

Dirt bikers have been illegally building a track, jumps, and wooden platforms off an established nature trail at the Soak Hides Dreen, according to a Rivers Road resident who called police on Oct. 25. The bikers are usually there around 3 p.m., the resident said. Officers were given photos as evidence.