Jennings Environmental Education Center, Route 528, Brady Township, will host a 90-minute wildflower walk at 2 p.m. Sunday. Jennings is open 8 a.m. to 4 p.m. weekdays and on weekends as scheduled. The trails are open daily from sunrise to sunset. Call 724-794-6011.

The third annual Armstrong Trail Fundraising Ride, hosted by the Armstrong Rails to Trails Association and the Allegheny Valley Land Trust, will take place May 17. The event will be held rain or shine and offers a choice of an 18-mile or 30-mile round trip bicycle ride or a 4-mile round trip walk or ride. Call 412-759-9152 or send e-mail to toni.henry51@gmail.com. Proceeds will be used for trail development.