The Rails to Trails Conservancy is using GPS to map all the rail-trails in the US for the first time. They’re seeking help from trail users to collect GPS tracklogs and waypoints. If you’re interested in helping, all you need is a GPS unit. If you don’t have one, RTC can arrange a loaner. For more information, see the GPS mapping page at the RTC website, or send an email to firstname.lastname@example.org.