State Highway 100 (SH 100) is a Texas state highway that runs between "Russeltown" and

Port Isabel Port Isabel may refer to: Places *Port Isabel, Texas, USA; a city in Cameron County *Port Isabel, Sonora, Mexico; a former port (1864-1879) at the mouth of the Colorado River * Port Isabel Independent School District, Cameron County, Texas, USA *Po ...

. It was designated in 1926 along its current route. Its western terminus is at Interstate 69E/U.S. Highway 77/83 and ends at the western end of the Queen Isabella Memorial Causeway at Port Isabel. The route continues as

Texas Park Road 100 Park Road 100 (PR 100) is a park road in the Rio Grande Valley in Cameron County, in the U.S. state of Texas. It runs along South Padre Island through the town of the same name. Route description PR 100 begins at the Queen Isabella Causeway in ...

east and north to a dead end on

South Padre Island South Padre Island is a barrier island in the U.S. state of Texas. The remote landform is located in Cameron County, Willacy County, and accessible by the Queen Isabella Causeway. South Padre Island was formed when the creation of the Port Mans ...

History

SH 100 was designated on September 15, 1924 on most of its current routing in Deep South Texas, but it ended at Gomez Street in Port Isabel. Since its initial construction, the only two changes in the routing was on January 23, 1975, when SH 100 was extended east 0.5 miles replacing the section of PR 100 from Gomez Street to the western end of the Queen Isabella Causeway, and that SH 100 was rerouted the city of Port Isabel, where the route was transferred to separate one way surface streets to better handle flow onto the Queen Isabella Causeway

Route description

SH 100 begins at an intersection with

Interstate 69E Interstate 69E (I-69E) is a north–south freeway running through South Texas. Once complete, the freeway will begin in Brownsville and head northward before terminating near Victoria as both I-69W and I-69E merge into I-69 toward Housto ...

U.S. Route 77 U.S. Route 77 (US 77) is a major north–south United States Numbered Highway which extends for in the central United States. As of 2005, Its southern terminus is in Brownsville, Texas, at Veteran's International Bridge on the Mexican border, whe ...

U.S. Route 83 U.S. Route 83 (US 83) is a major north–south United States Numbered Highway that extends in the central United States. Only four other north–south routes are longer: US 1, US 41, US 59, and US 87, while US ...

and Farm to Market Road 1421 at unincorporated Russelltown (formerly known as Barreda). The route travels due east, passing through downtown Los Fresnos. The route continues east before turning northeast where it formerly met Old Port Isabel Road, which connected Brownsville and Port Isabel. At this point the route becomes a 4-lane divided highway. The route continues northeast and east around the northern edge of Bahia Grande before reaching the southmost edge of Laguna Vista. The route then turns southeast, running along the coast of the

Laguna Madre The Laguna Madre is a long, shallow, hypersaline lagoon along the western coast of the Gulf of Mexico in Nueces, Kenedy, Kleberg, Willacy and Cameron Counties in Texas, United States. It is one of seven major estuaries along the Gulf Coas ...

. Continuing southeast, it passes through the town of Laguna Heights, before reaching the city of

. It reaches its eastern terminus at the Queen Isabella Causeway, which continues across the

Junction list

References

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100 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to de ...

Transportation in Cameron County, Texas