Beginning at SVT's Wolbach Farm, avid biker and SVT member Dick Williamson will lead a casual 15-20 mile bike tour Sept. 7, 10 a.m. 2 p.m. Attendees will cycle to numerous SVT properties in Sudbury and Wayland, where they will be led on short walks. Bring a lunch for a noon-time stop at Round Hill. Helmets are required. Open to riders of all abilities, including families with appropriate child carriers (seat or trailer). Free for SVT members and $10 for non-members. Call 978-443-5588 or visit www.sudburyvalleytrustees.org to register or find out more.