If you’re one of the many Austinites who enjoy spending time on the Violet Crown Trail, you might consider joining forces with Hill Country Conservancy and Emerging Professionals In Conservation to help keep the trail clean and safe. Volunteers will meet at the Dick Nichols Trailhead (near the Arbor Trails shopping center) “and spend about two hours on the trail picking up trash, removing graffiti and enjoying a leisurely walk.” Oct. 9, 10 a.m.-noon. Register in advance on Eventbrite.