| Holliday Brook | |
|---|---|
  Location of the mouth of Holliday Brook in New York  Holliday Brook (the US) | |
| Country | United States |
| State | New York |
| County | Delaware |
| Physical characteristics | |
| Source | |
| - coordinates | 42°02′34″N74°50′21″W / 42.0428662°N 74.8390489°W |
| River mouth | Pepacton Reservoir |
| - coordinates | 42°04′36″N74°53′21″W / 42.0767544°N 74.8890501°W Coordinates: 42°04′36″N74°53′21″W / 42.0767544°N 74.8890501°W [1] |
| - elevation | 1,280 ft (390 m) |
| Basin features | |
| Tributaries | |
| - right | Gulf Brook |
Holliday Brook is a river in Delaware County in New York. It flows into the Pepacton Reservoir east-southeast of Downsville.