Walk through Witham Oaks: 1 p.m. March 26, meet at the Witham Hill Natural Area parking lot south of the intersection of Circle Boulevard and Witham Drive. A free walk through the Witham Oaks property. Learn why this easily accessible oak savanna, upland prairie and wetland area should be preserved for all to enjoy. Contact 541-740-1497 for more information. Sponsored by the Friends of Witham Oaks.