Biking down the Lehigh Gorge Trail
There are several State Parks close to Hazleton, the Lehigh Gorge State Park being one of them.
Here you will find the Lehigh Gorge bike trail. It's 26 miles and starts in White Haven and ends in Jim Thorpe. The trail is well maintained and follows the Lehigh River with many feeder streams and waterfalls. Since the trail is well maintained, most any bike will do. Starting at White Haven it's all downhill and a very easy ride.
If you don't have a bike, there are several places to rent bikes in the area.