The Boston Bluegrass Union presents the 25th Joe Val Bluegrass Festival, a three-day winter tradition that boasts a full weekend of top-notch bluegrass entertainment.
The festival features performances by national and regional bands, 40 master classes and workshops, the unionís Academy for Kids, directed slow jams, and vendors.
It takes place Friday through Sunday at the Sheraton Framingham Hotel & Conference Center, 1657 Worcester Road. Single-day tickets from $25 to $50, $10 to $25 for ages 12-16; festival tickets $90, or $85 for Boston Bluegrass Union members, $30 for ages 12-16. 508-879-7200, www.bbu.org.