| Mile | Street Name | Feature (West to East) |
| 0.00 | CR 90 BEGINS, Allendale Boro | |
| 0.00 | E Allendale Ave | Franklin Tpk, CR 507 {signal} |
| 0.77 | Entering Saddle River Boro | |
| 0.96 | East Allendale Rd | NJ 17 {underpass} |
| 1.46 | East Allendale Rd | West Saddle River Rd, CR 77 {signal} |
| 1.56 | East Allendale Rd | Saddle River {bridge} |
| 1.61 | East Allendale Rd | (East Saddle River Rd, CR 75) {signal} |
| 1.61 | Next 0.24 mile co-signed with CR 75 | |
| 1.85 | East Allendale Rd | [East Saddle River Rd, CR 75] |
| 2.01 | East Allendale Rd | Unnamed stream {pipe} |
| 2.06 | East Allendale Rd | Branch Saddle River {pipe} |
| 2.22 | CR 90 turns right onto Woodcliff Lake Rd | |
| 2.22 | Woodcliff Lake Rd | East Allendale Rd, CR 92 |
| 2.53 | Woodcliff Lake Rd | Chestnut Ridge Rd, CR 73 |
| 2.68 | Woodcliff Lake Rd | Unnamed stream {bridge} |
| 3.10 | Entering Woodcliff Lake Boro | |
| 3.10 | CR 90 turns left onto Chestnut Ridge Rd | |
| 3.17 | CR 90 turns right onto Saddle River Rd | |
| 3.17 | Saddle River Rd | (Chestnut Ridge Rd, CR S-73) |
| 3.42 | Saddle River Rd | Garden State Pkwy, NJ 444 {overpass} |
| 3.62 | Saddle River Rd | Unnamed stream {pipe} |
| 3.71 | Saddle River Rd | Werimus Rd, CR 71 |
| 3.71 | CR 90 turns right onto Werimus Rd | |
| 3.71 | Next 0.17 mile co-signed with CR 71 | |
| 3.88 | CR 90 turns left onto Woodcliff Ave | |
| 3.88 | Woodcliff Ave | Werimus Rd, CR 71 |
| 4.35 | Woodcliff Ave | Unnamed stream {pipe} |
| 4.62 | Woodcliff Ave | Pascack Rd, CR 63 |
| 5.06 | Woodcliff Ave | Woodcliff Lake {bridge} |
| 5.11 | Woodcliff Ave | Erie Railroad {at-grade crossing} |
| 5.13 | Woodcliff Ave | Broadway, CR 104 |
| 5.13 | CR 90 turns right onto Broadway | |
| 5.13 | Next 0.13 mile co-signed with CR 104 | |
| 5.26 | CR 90 turns left onto Prospect Ave | |
| 5.26 | Prospect Ave | Broadway, CR 104 |
| 5.58 | Prospect Ave | Kinderkamack Rd, CR 503 {signal} |
| 5.78 | Prospect Ave | Unnamed stream {pipe} |
| 5.85 | Prospect Ave | Unnamed stream {pipe} |
| 5.88 | Prospect Ave | Unnamed stream {bridge} |
| 6.01 | Prospect Ave | (Park Ridge Ave) [Ruckman Rd], CR 92 {signal} |
| 6.11 | Entering Park Ridge Boro | |
| 6.35 | Entering River Vale Twp | |
| 6.77 | Prospect Ave | Unnamed stream {pipe} |
| 6.89 | Prospect Ave | River Vale Rd, CR 53 |
| 6.89 | CR 90 ENDS, River Vale Twp | |