| Mile | Street Name | Feature (South to North) |
| 0.00 | CR 621 BEGINS, Clifton City | |
| 0.00 | Entering Clifton City | |
| 0.00 | Valley Rd | (Normal Ave, Essex CR 618) |
| 0.99 | Valley Rd | US 46 {underpass} |
| 1.07 | Valley Rd | (Ramp to US 46 and Notch Rd, CR 709) |
| 1.64 | Valley Rd | [Van Houten Ave, CR 614] {signal} |
| 2.84 | Valley Rd | (Mountain Park Rd) [Fenner Ave], CR 634 {signal} |
| 3.08 | Entering Paterson City | |
| 3.09 | Valley Rd | (County park entrance, Lambert Castle) |
| 3.14 | Valley Rd | NJ 19 {overpass} |
| 3.23 | Valley Rd | Lackawanna Railroad (tracks removed) {overpass} |
| 3.32 | Valley Rd | Marshall St, CR 509 {signal} |
| 3.32 | CR 621 bears right onto Barclay St | |
| 3.49 | Barclay St | Main St, CR 601 {signal} |
| 3.49 | CR 621 ENDS, Paterson City | |