Falling Spring Run
A narrow classic limestone spring creek near Chambersburg in Franklin County, historically famous for prolific Trico hatches and wild rainbow trout, with ongoing habitat-restoration work led by Falling Spring Greenway and the Falling Spring Chapter of Trout Unlimited.
Approach low and slow; meadow spring creek trout are spooky and the water is glassy.
Tricos, Baetis, midges, scuds, sowbugs, and small terrestrials are the core boxes.
Confirm current PFBC regulations and the boundaries of any heritage / catch-and-release sections before fishing.