Workdays are an excellent way to give back to Thorn Creek Woods Nature Preserve! Join the Thorn Creek trail work crew in building and repairing boardwalks and maintaining the trails throughout the preserve. Or help weed and nurture our Prairie Sampler. Bring a lunch and gloves and dress for the weather. Wear sturdy shoes or boots. Refreshments will be provided. Outdoor work is on natural surface trails across uneven terrain. Community groups are welcome.

Sunday, May 14. Noon–4 p.m. Ages 15–adult. Registration is required by Friday, May 12. Call 708-747-6320.