Mill Brook is a river in Delaware County and Ulster County in New York. It flows into the Pepacton Reservoir west of Arena.
| Mill Brook | |
|---|---|
| Location | |
| Country | United States |
| State | New York |
| Counties | Delaware, Ulster |
| Physical characteristics | |
| Source | |
| • coordinates | 42°02′59″N 74°35′27″W |
| Mouth | Pepacton Reservoir |
• coordinates | 42°06′58″N 74°44′46″W[1] |
• elevation | 1,280 ft (390 m) |