Here’s some additional information from Howard Davis.
“Antietam Creek – Saturday, June 4, 2022. Devils Backbone County Park (MD) to Burnside Bridge, 8 miles. Meet at the public parking across from McDonalds at Exit 20 off I-81, Scotland exit, at 8:15AM, depart 8:30 (or at the Devils Backbone put-in, 18934 Lappans Road Boonsboro, MD, at 9:30 AM). The Class I Antietam Creek s a CCGH favorite so please let me know if you plan to participate . . . firstname.lastname@example.org. Howard Davis”