No site in WV DEP's access file falls on the Blackwater River, so the way in is public ground and road crossings rather than a marked landing. 4 blocks of public land front the Blackwater River, and 17.5 of its 17.9 mapped miles run through them.
Canaan Valley National Wildlife Refuge — U.S. Fish and Wildlife Service, 13.16 mi of this river, 17,018 acres in all, restricted access
Canaan Valley Resort State Park — state natural-resources agency, 3.56 mi of this river, 5,805 acres in all
Monongahela National Forest — U.S. Forest Service, 0.41 mi of this river, 949,934 acres in all
Blackwater Wildlife Management Area — U.S. Forest Service, 0.41 mi of this river, 62,342 acres in all, restricted access
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.