Maryland Route 161 is a rural highway in Harford County running 5.38 miles north from MD 155 near Level to U.S. 1 west of Conowingo Village. MD 161 follows Darlington Road north to Wilson and Main Street through Darlington. MD 623 (Castleton Road) provides a cut off from MD 161 north to U.S. 1 north for Conowingo Dam and Cecil County.
| MD 161 (Darlington Road) stems north from MD 155 (Level Road) five miles to Darlington. 06/25/10 |
| Northbound shield for MD 161 posted along Darlington Road after the intersection with Rock Run Road west of Garland. 06/25/10 |
| Sinking toward Elbow Branch along MD 161 (Darlington Road) northbound. The scenic highway winds through patches of dense forest west of Susquehanna State Park. 06/25/10 |
| This is the second reassurance shield (since replaced) for picturesque and rural northbound MD 161. It is posted north of Old Quaker Road in Darlington. 04/30/04 |
| Northbound MD 161 (Darlington Road) reaches MD 623 (Castleton Road), which heads northeast as a short cut to north U.S. 1. 06/25/10 |