New York's access file puts 3 public sites on Twelvemile Creek — 2 walk-in sites and 1 launch, spread over the counties it runs through. 2 blocks of public land front Twelvemile Creek, and 3.3 of its 18.1 mapped miles run through them.
| Site | Type | River mile | County |
|---|---|---|---|
| Lake Ontario/Twelvemile Creek at Wilson | walk in | 0.2 | Niagara |
| Lake Ontario/Twelvemile Creek at Wilson | boat launch | 0.2 | Niagara |
| Lake Ontario at Wilson | walk in | 0.0 | Niagara |
2 walk-in, 1 launch, from New York's own access file. River mile is measured up from the mouth along this river's drawn axis.
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.
Twelvemile Creek — live water temperature, regulations and access