| North Branch Kishwaukee River | |
| Source1 Coordinates: | 42.4469°N -88.5381°W |
| Mouth Coordinates: | 42.2658°N -88.5511°W |
| Progression: | North Branch Kishwaukee River → Kishwaukee → Rock → Mississippi → Gulf of Mexico |
| Source1 Elevation: | 966feet |
| Mouth Elevation: | 810feet |
| Length: | 17miles |
| Custom Label: | GNIS ID |
The North Branch Kishwaukee River is a 17.1adj=midNaNadj=mid[1] tributary of the Kishwaukee River in northern Illinois.[2]
The North Branch Kishwaukee River northeast of Harvard, Illinois and flows south through McHenry County.[3] to join the Kishwaukee River east of Marengo.[1] It drains approximately 40sqmi of land area,[3] flowing for 17 miles.[1]
The North Branch Kishwaukee River flows in an east–west direction from its point of origin and has a generally unimpeded flow, save a dam at Belvidere, Illinois.[4] The North Branch has an average width of 50feet, but in Boone County the stream becomes both wider and deeper.[4] Nearer its point of origin the North Branch has a substrate of gravel, the substrate becomes sand and silt going further downstream.[4]