New York's access file puts 4 public sites on the Mongaup River — 3 walk-in sites and 1 launch, spread over the counties it runs through. 1 block of public land fronts the Mongaup River, and 6.7 of its 12.1 mapped miles run through it.
| Site | Type | River mile | County |
|---|---|---|---|
| Mongaup Falls Reservoir at Forestburgh | walk in | 10.5 | Sullivan |
| Rio Reservoir at Forestburgh | boat launch | 7.9 | Sullivan |
| Rio Reservoir at Lumberland | walk in | 4.6 | Sullivan |
| Delaware River at Sparrow Bush | walk in | 0.1 | Sullivan |
3 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.
Mongaup River — live water temperature, regulations and access