State Road 100 is a 151-mile-long northwest-southeast highway serving northeastern Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

. Its northwestern terminus is at the Georgia

Georgia (U.S. state)

Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...

-Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 border four miles (6 km) north of Avoca, Florida (its continuation in Georgia is State Route 11); its southeastern terminus is an intersection with Shore Scenic Highway (SR A1A

State Road A1A (Florida)

State Road A1A is a Florida State Road that runs mostly along the Atlantic Ocean, with sections from Key West at the southern tip of Florida, to Callahan, just south of Georgia. It is the main road through most oceanfront towns. SR A1A is designated the A1A Scenic and Historic Coastal Highway, a...

) in Flagler Beach

Flagler Beach, Florida

Flagler Beach is a city in Flagler and Volusia counties in the U.S. state of Florida. The population was 4,954 at the 2000 census, with an estimated population of 5,228 in 2004.Flagler Beach is part of the Palm Coast Metropolitan Statistical Area...

. Some sections are signed north–south, while others are signed east–west.

Route description

The northernmost eight miles (13 km) of SR 100 are signed (north–south) as US 129. For three miles (5 km) in Jasper

Jasper, Florida

Jasper is a city in Hamilton County, Florida, United States. The population was 1,780 at the 2000 census. As of 2004, the population estimated by the U.S. Census Bureau is 1,848 . It is the county seat of Hamilton County. The United Methodist Church in Jasper, Florida is on the National Register...

, it merges with US 41(SR 25

State Road 25 (Florida)

State Road 25 is a state highway in the U.S. state of Florida.It is mainly signed as U.S. Highways:*U.S. Highway 27 from Miami to Lady Lake and Belleview to Ocala*U.S. Highway 301 from Belleview to near Sparr...

) before separating from US 129 (which has the hidden Florida Department of Transportation

Florida Department of Transportation

The Florida Department of Transportation is a decentralized agency charged with the establishment, maintenance, and regulation of public transportation in the state of Florida. The department was formed in 1969. It absorbed the powers of the Florida State Road Department...

 designation SR 51

State Road 51 (Florida)

State Road 51 is a north–south route in north Florida. Its northern terminus is at the junction of US 41 and US 129. It runs southwards as the "secret" designation of US 129 to Live Oak, where it splits off and runs independently south to Steinhatchee. The Hal W...

 between the split and Live Oak

Live Oak, Florida

Live Oak is a city in Suwannee County, Florida. The city is the county seat of Suwannee County and is located east of Tallahassee, Florida. The population was 6,480 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 6,828 ....

). Southeast of the split, SR 100 signage can be seen alongside the road, beside US 41 signs (hidden SR 25

State Road 25 (Florida)

State Road 25 is a state highway in the U.S. state of Florida.It is mainly signed as U.S. Highways:*U.S. Highway 27 from Miami to Lady Lake and Belleview to Ocala*U.S. Highway 301 from Belleview to near Sparr...

) north of Lake City

Lake City, Florida

Lake City is the county seat of Columbia County, Florida, in the United States. In 2009, the U.S. Census Bureau estimated the city's population at 12,614. In addition, it is the Principal City of the Lake City Micropolitan Statistical Area, which is composed of Columbia County, and had an...

 and beside US 90 signs (hidden SR 10

State Road 10 (Florida)

State Road 10 , also known as Atlantic Boulevard, is a major east–west state highway in the U.S. state of Florida. Mostly unsigned in favor of U.S. Highway 90, it runs from the Alabama state line to Atlantic Beach. The only sections that are not signed as US 90 are north of Pensacola, where...

) along a two-mile-long stretch of East Duval Street in Lake City.

East of Lake City, SR 100 is signed east–west as it continues along a northwest-southeast pathway toward the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

, serving, amongst other municipalities, Lake Butler

Lake Butler, Union County, Florida

Lake Butler is a city in Union County, Florida, United States. The population was 1,927 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 1,988...

, Starke

Starke, Florida

Starke is a city in Bradford County, Florida, United States. The population was 5,593 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 5,769 ....

, Keystone Heights

Keystone Heights, Florida

Keystone Heights is a town located in both Bradford County and Clay County, Florida, United States. The population was 1,349 at the 2000 census, all of it in the Clay County section, although over 40 percent of the city's area lies in Bradford County. As of 2004, the population recorded by the U.S...

, and Putnam Hall

Putnam Hall, Florida

Putnam Hall is an unincorporated community in Putnam County, Florida, United States. It is located near the State Road 100/State Road 26 intersection.-Geography:Putnam Hall is located at ....

 before merging with US 17 (hidden SR 15

State Road 15 (Florida)

State Road 15 is part of the Florida State Road System. It runs from SR 80/SR 880 at Belle Glade north along the east shore of Lake Okeechobee to Okeechobee. Then it runs north to SR 500 at Holopaw, and northwest along SR 500 to Ashton State Road 15 (commonly SR 15) is part of the Florida State...

) on Reid Street in Palatka

Palatka, Florida

Palatka is a city in Putnam County, Florida, United States. The population was 10,033 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 10,796. It is the county seat of Putnam County and includes East Palatka. Palatka is the principal city of the Palatka...

, just west of their bridge crossing at St. Johns River

St. Johns River

The St. Johns River is the longest river in the U.S. state of Florida and its most significant for commercial and recreational use. At long, it winds through or borders twelve counties, three of which are the state's largest. The drop in elevation from the headwaters to the mouth is less than ;...

.

State Road 100 separates from US 17/SR 15 in San Mateo

San Mateo, Florida

San Mateo is an unincorporated community in Putnam County, Florida, United States, located just southeast of the city of Palatka. It is on the east shore of the St. Johns River.-Geography:It is located at , with an elevation of...

 and continues in a more easterly direction through Shell Bluff Landing, Bimini

Bimini, Florida

Bimini is an unincorporated community in Flagler County, Florida, United States. It is located west of Bunnell on Florida State Road 100. The community is part of the Palm Coast Metropolitan Statistical Area....

, Bunnell

Bunnell, Florida

Bunnell is the county seat of Flagler County Florida with a population of 2,122 at the 2000 census. According to the U.S Census estimates of 2008, the city's population had grown to 3,190. The city is part of the Palm Coast Metropolitan Statistical Area and is named after early resident, Alvah A...

 (where SR 100 overlaps U.S. Route 1/SR 5

State Road 5 (Florida)

State Road 5 is a mostly-unsigned state highway in the state of Florida. It is mainly signed as U.S. Route 1 from its south end in Key West, Florida to Jacksonville, Florida, and U.S. Route 17 from Jacksonville to the Georgia state line at the Saint Marys River. U.S...

 for a mile) and Palm Coast

Palm Coast, Florida

Palm Coast is a city in Flagler County, Florida. As of the 2010 census, the population was 75,180; it is the most populous city or town in Flagler County. Palm Coast is a principal town of the Palm Coast, Florida Metropolitan Statistical Area, designated in 2007...

 before it reaches SR A1A on the Atlantic coast.

Major junctions

County	Location	Mile	Destinations	Notes
	Flagler Beach Flagler Beach, Florida Flagler Beach is a city in Flagler and Volusia counties in the U.S. state of Florida. The population was 4,954 at the 2000 census, with an estimated population of 5,228 in 2004.Flagler Beach is part of the Palm Coast Metropolitan Statistical Area...			Southern terminus
	Bunnell Bunnell, Florida Bunnell is the county seat of Flagler County Florida with a population of 2,122 at the 2000 census. According to the U.S Census estimates of 2008, the city's population had grown to 3,190. The city is part of the Palm Coast Metropolitan Statistical Area and is named after early resident, Alvah A...
	San Mateo San Mateo, Florida San Mateo is an unincorporated community in Putnam County, Florida, United States, located just southeast of the city of Palatka. It is on the east shore of the St. Johns River.-Geography:It is located at , with an elevation of...
	East Palatka East Palatka, Florida East Palatka is a census-designated place in Putnam County, Florida, United States. The population was 1,654 at the 2010 census.-Geography:East Palatka is located at ....
	Palatka Palatka, Florida Palatka is a city in Putnam County, Florida, United States. The population was 10,033 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 10,796. It is the county seat of Putnam County and includes East Palatka. Palatka is the principal city of the Palatka...
	Putnam Putnam Hall, Florida Putnam Hall is an unincorporated community in Putnam County, Florida, United States. It is located near the State Road 100/State Road 26 intersection.-Geography:Putnam Hall is located at ....
	Keystone Heights Keystone Heights, Florida Keystone Heights is a town located in both Bradford County and Clay County, Florida, United States. The population was 1,349 at the 2000 census, all of it in the Clay County section, although over 40 percent of the city's area lies in Bradford County. As of 2004, the population recorded by the U.S...
	Starke Starke, Florida Starke is a city in Bradford County, Florida, United States. The population was 5,593 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 5,769 ....
	Lake Butler Lake Butler, Union County, Florida Lake Butler is a city in Union County, Florida, United States. The population was 1,927 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 1,988...
	Watertown Watertown, Florida Watertown is a census-designated place in Columbia County, Florida. As of the 2000 census, it had a population of 2,837.- Geography :Watertown is located at 30°11'11" North, 82°36'30" West ....
	Lake City Lake City, Florida Lake City is the county seat of Columbia County, Florida, in the United States. In 2009, the U.S. Census Bureau estimated the city's population at 12,614. In addition, it is the Principal City of the Lake City Micropolitan Statistical Area, which is composed of Columbia County, and had an...
	White Springs White Springs, Florida White Springs is a town in Hamilton County, Florida, on the Suwannee River. The population was 819 at the 2000 census. According to the U.S. Census Bureau's 2004 estimates, the town had a population of 828...
	Jasper Jasper, Florida Jasper is a city in Hamilton County, Florida, United States. The population was 1,780 at the 2000 census. As of 2004, the population estimated by the U.S. Census Bureau is 1,848 . It is the county seat of Hamilton County. The United Methodist Church in Jasper, Florida is on the National Register...
				Northern terminus