| Lively Run | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Mouth: | Cayuga Lake |
| Mouth Location: | Interlaken Beach, New York, United States |
| Mouth Coordinates: | 42.63°N -76.6881°W |
| Basin Size: | 1.97sqmi |
Lively Run is a river located in Seneca County, New York. It flows into Cayuga Lake by Interlaken Beach, New York.[1]