Maine State Route 121
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State Route 121 (SR121) is a 36-mile-long (58km) state highway in southern Maine. It begins at an intersection with U.S. Route 302 (US302) and SR35 in Raymond and ends in Auburn. It is signed as a north-south highway, which accurately reflects its alignment from Raymond to Oxford, but from there it runs almost due east (and slightly south) to its terminus in Auburn. Its overall routing is roughly L-shaped.
Route description
SR121 begins at an intersection with US302 and SR35 in Raymond, not far from the southern terminus of SR85. It proceeds northward, paralleling SR85 to the west of Panther Pond until reaching its first intersection with SR11 in Casco. It continues north along the west side of Pleasant Lake and Thompson Lake before entering Oxford, where it turns to the east to meet SR26 just south of the Oxford County Regional Airport. SR121 briefly joins SR26 in a wrong-way concurrency before splitting off southeast towards Mechanic Falls (continually signed as "north"). It heads into the town center where it meets the southern terminus of SR124 and SR11 for a second time. From here to its terminus in Auburn, SR121 is overlapped by SR11.

SR11 and SR121 proceed out of town to the southeast (both signed as "north"), meeting the southern terminus of SR119 before entering Auburn and proceeding towards downtown on Minot Avenue. At the intersection of Minot Avenue and Rotary Street (the latter of which also carries southbound US202, SR4, and SR100 on a one-way pair), SR 11 and SR121 turn north on Washington Street (joining US202, SR 4, and SR 100). Prior to 2023, this intersection was signed as the northern terminus of SR 121. Continuing north, Washington Street meets the southbound lanes at Minot Avenue, then reaches the intersection of Court Street, Union Street, and Minot Avenue, where the SR 121 designation officially ends. SR 4 continues straight onto Court Street while US 202, SR 11 and SR 100 turn east onto Union Street towards Lewiston.
Major intersections
| County | Location | mi | km | Destinations | Notes |
|---|---|---|---|---|---|
| Cumberland | Raymond | 0.00 | 0.00 | US302/ SR35 (Roosevelt Trail)– Casco, Windham, Naples | Southern terminus |
| Casco | 6.70 | 10.78 | SR11 (Poland Spring Road)– Naples, Auburn | ||
| Oxford | Oxford | 20.89 | 33.62 | SR26 north (Main Street)– Norway | Southern end of SR 26 concurrency |
| 21.38 | 34.41 | SR26 south (Main Street)– Gray | Northern end of SR 26 concurrency | ||
| Androscoggin | Mechanic Falls | 25.92 | 41.71 | SR11 south (South Main Street)/ SR124 north (North Main Street)– West Minot, Naples | Southern end of SR 11 concurrency; southern terminus of SR 124 |
| Minot | 29.45 | 47.40 | SR119 north– Hebron | Southern terminus of SR 119 | |
| Auburn | 34.83 | 56.05 | US202 west/ SR4 south/ SR100 south (Rotary Street) to I-95/ Maine Turnpike | Southern end of US202/SR4/SR100 concurrency | |
| 35.69 | 57.44 | US202 east/ SR11 north/ SR100 north (Court Street)/ SR4 north (Union Street)– Lewiston, Augusta, Farmington | Northern terminus | ||
| 1.000mi = 1.609km; 1.000km = 0.621mi Concurrency terminus |
External links
- Media related toMaine State Route 121at Wikimedia Commons