No site in Pennsylvania's access file falls on Antietam Creek, so the way in is public ground and road crossings rather than a marked landing. 9 blocks of public land front Antietam Creek, and 3.4 of its 9.7 mapped miles run through them.
Antietam Lake Park — county land, 1.34 mi of this river, 642 acres in all
Reading Country Club — city land, 0.59 mi of this river, 123 acres in all, access unrecorded
Exeter Township Community Park — city land, 0.35 mi of this river, 33 acres in all
Scenic Community Park — city land, 0.35 mi of this river, 17 acres in all
William Penn State Forest — state natural-resources agency, 0.19 mi of this river, 1,359 acres in all
Ruth Zimmerman Natural Area — another state agency, 0.19 mi of this river, 34 acres in all
William Penn State Forest - Ruth Zimmerman Natural Area — state natural-resources agency, 0.19 mi of this river, 33 acres in all
Carsonia Park — regional agency, 0.14 mi of this river, 28 acres in all
Berks County Park — county land, 0.06 mi of this river, 1,129 acres in all, access unrecorded
Ownership from PAD-US as the state publishes it. Where a block has its own page, the name
links to it. The river miles are how far this river's drawn axis runs inside each block, measured here;
the acreage is the whole unit's, most of which is nowhere near this water. "Restricted access" and "access unrecorded" are PAD-US's own words for the block, and
neither one means open — check before you park.