Did you know Blackthorn Hill Nature Preserve, five miles northwest of Galesburg, is free and open to the public? If you've never been there before, this weekend is the best time to go. On Saturday, Western Illinois Nature Group, which maintains Blackthorn Hill, is taking part in National Trails Day, with guided hiking and live music. Martin Reichel, a board member of WING, talks about it with Will Stevenson on Galesburg's Morning News.