Florida State Road 121

State Road 121
Route information
Maintained by FDOT
Length:	101.867 mi (163.939 km)
Major junctions
South end:	US 19 / US 98 at Lebanon Station
	US 27 / US 41 in Williston I-75 in Gainesville I-10 in Macclenny
North end:	SR 23 / SR 121 near Stokesville, GA
Highway system
Florida State Highway System Interstate US SR Former Pre-1945 Toll ← SR 120 SR 122 →

State Road 121 (SR 121) is a major state highway that runs north and south in northern Florida. The road is part of a long multi-state route that also goes through Georgia and South Carolina.

Route description

Beginning in Lebanon Station at a channelized intersection with US 19-98 and County Road 336, State Road 121 runs through Goethe State Forest where it turns east and intersects with CR 337. The road makes a sharp left curve to the northeast where it runs through desolate farmland; the only resemblance to a major intersection is CR 326. Within the city of Williston, SR 121 overlaps CR 316, until the intersection with US 41. It then joins US 41 as CR 316 continues eastward, which then joins the east end of ALT US 27, and then the US 27-41 concurrency before breaking away to the northeast again, taking the DeSoto Trail away from US 41.

North of CR 335, SR 121 hugs the west side of the Levy-Marion County Line, but never crosses it, choosing to enter Alachua County instead. Immediately after the interchange with Interstate 75(Exit 382), SR 121 makes a sharp left onto Northwest 34th Street as SR 331 becomes the designation for Williston Road. As it crosses SR 24 it borders the University of Florida to the east until crossing SR 26A and then SR 26. North of US 441, the DeSoto Trail breaks away.

After the intersection with CR 236 in Santa Fe, SR 121 is carried along bridges across the former Seaboard Coast Line railroad line to Crystal River Nuclear Power Plant and Santa Fe River in Worthington Springs, where it intersects with SR 18.

Briefly running parallel to SR 100 in Lake Butler, it intersects with SR 100 as it continues northeast. The road also intersects SR 16 in Raiford, and Interstate 10(Exit 335) and US 90 in Macclenny close to SR 228 before crossing the Georgia border on its way to South Carolina.

History

State Road 23 was defined in the 1945 renumbering as:

• From a point on SR 20 and SR 25 approximately 1 mile (1.6 km) northwest of Paradise in a northwesterly direction to the intersection with SR 235 in LaCrosse and along SR 235 for approximately 0.07 miles (0.11 km), then continuing northwesterly via Santa Fe to a junction with SR 18 at Worthington Springs and along SR 18 to a point approximately 1 mile (1.6 km) north of Worthington Springs, then northeasterly to a junction with SR 100 in Lake Butler and East on SR 100 to a point near the eastern city limits of Lake Butler then northeasterly via Raiford to a junction with SR 10 in Macclenny and along SR 10 to 5th Street then in a northerly direction along 5th Street to the St. Mary's River at the Georgia state line.

Prior to the renumbering, this had been:

• SR 99 from northwest of Paradise to Worthington Springs
• SR 113 from northwest of Paradise to LaCrosse
• SR 49 from Worthington Springs to Georgia

At some point, SR 23 was renumbered as part of SR 121, probably to match Georgia State Route 121. Before that, however, SR 23 had been extended around the west side of Gainesville to end at US 441/SR 25 at Rocky Point, and the southernmost part did not become part of SR 121. It was later given to the county, and has a possibility of becoming County Road 23.

The State Road 23 designation has since been reused for a partial beltway around Jacksonville.

Major intersections

County	Location	mi	km	Destinations	Notes
Levy	Lebanon Station	0.000– 0.135	0.000– 0.217	US 19 / US 98 (SR 55) / CR 336 east – Inglis, St. Petersburg, Chiefland
	​	5.086	8.185	CR 337 – Bronson
	​	8.354	13.444	CR 464 east
	​	11.573	18.625	CR 326 – Henry Beck Park
	​	16.808	27.050	CR 316 west (Northeast 20th Street)
	​	17.959	28.902	CR 335A north (Northeast 167th Court)
	Williston	20.224	32.547	US 41 south (SR 45) / CR 316 east (Northeast 30th Street) – Morriston, Dunnellon, Tampa	south end of US 41 / SR 45 overlap
		21.034	33.851	US 27 Alt. north (SR 500) – Bronson	south end of US 27 Alt. / SR 500 overlap
		21.559	34.696	US 27 south (Noble Avenue / SR 500) – Ocala	north end of US 27 Alt. / SR 500 overlap; south end of US 27 overlap
		21.979	35.372	US 27 north / US 41 north (North Main Street / SR 45) – Archer	north end of US 27 / US 41 / SR 45 overlap
		22.914	36.877	CR 318A (Mixson Road / Northeast 50th Street)
	​	23.885	38.439	CR 331A south
	​	26.018	41.872	CR 335 (Northeast 75th Street)
	​	28.284	45.519	CR 320 east
Alachua	​	30.205	48.610	CR 346 west
	​	32.231	51.871	CR 346A west (Southwest 137th Avenue)
	Gainesville	32.98	53.08	I-75 (SR 93) – Lake City, Tampa, truck route to SR 24 west / SR 26 west	I-75 exit 382
		38.157	61.408	SR 331 north (Williston Road) to US 441 / US 301 – Gainesville, truck route to SR 121 north / SR 24 east / SR 26 east
		39.765	63.996	SR 24 (Archer Road) to I-75 – Archer, Waldo
		41.369	66.577	SR 26A (Southwest 2nd Avenue)
		41.489	66.770	SR 26 (West University Avenue)
		44.017	70.838	SR 222 (Northwest 39th Avenue) to I-75 – Orange Heights
		45.290	72.887	CR 232 (Northwest 53rd Avenue)
		46.200	74.352	US 441 (SR 20 / SR 25) – Alachua, Gainesville, truck route to SR 121 south
		49.303	79.345	CR 231 north
	LaCrosse	55.922	89.998	SR 235 south – Alachua	south end of SR 235 overlap
		56.176	90.407	SR 235 north – Brooker	north end of SR 235 overlap
		56.513	90.949	CR 1493 north
	Santa Fe	59.281	95.404	CR 236 west
	​	61.620	99.168	CR 239 south
Union	Worthington Springs	62.703	100.911	SR 18 east – Brooker
		63.726	102.557	CR 18 west – Fort White
	Dukes	65.622	105.608	CR 18A east / CR 239A west
	​	66.908	107.678	CR 231A east / CR 796 west (Southwest 76th Street)
	Lake Butler	70.913	114.123	SR 231 (Dr. M.L. King Jr. Avenue)
		72.307	116.367	SR 100 – Lake City, Starke
	Johnstown	76.748	123.514	CR 237 south
	Raiford	78.752	126.739	CR 229
		79.618	128.133	SR 16 east – State Prison, Starke
	​	83.245	133.970	CR 125 south
Baker	​	89.612	144.217	CR 125 north – Glen St. Mary
	​	91.524	147.294	CR 130 west (Mud Lake Road)
	Macclenny	94.532	152.135	CR 23A west (Woodlawn Road)
		94.65	152.32	I-10 (SR 8) – Lake City, Jacksonville	I-10 exit 335
		95.600	153.853	CR 23A (Lowder Street)
		96.259	154.914	US 90 (Macclenny Avenue / SR 10) – Glen St. Mary, Baldwin
		97.449	156.829	CR 23B west / CR 228 east – Baker County Fair Grounds
	​	99.829	160.659	CR 23C (Steel Bridge Road)
	​	101.380	163.155	CR 23D west
	​	101.867	163.939	SR 23 north / SR 121 north – St. George, Folkston	Georgia state line (St. Marys River bridge)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

County Road 121A

County Road 121A
Location:	LaCrosse

County Road 121A is the sole suffixed alternate of SR 121 that exists within the State of Florida. It is a former segment of SR 121 that exists entirely in LaCrosse. The route is unmarked, and runs along the east side of SR 121 south of downtown to halfway between the SR 121/235 overlap across from the LaCrosse Post Office.