Emerald Ash borers

JEFF ST. CLAIR / WKSU

A large-scale volunteer program at the Cuyahoga Valley National Park is turning 25 this year.

The Trailblazers program started in 1993, with the opening of the Ohio & Erie Canal Towpath Trail. Participants work in pairs patrolling 110 miles of trail in the national park and assisting visitors with everything from flat tires to basic first aid.

photo of Jennifer Koch
STEVE BROWN / WOSU

It’s been about 20 years since the invasive emerald ash borer first showed up in the U.S. and started killing ash trees. It’s claimed millions of the trees and remains a big threat to Ohio forests. But there is new hope for an ash-tree comeback. One researcher thinks she’s making progress by breeding resistance to the pest.