Texas State Highway 300

State Highway 300 (SH 300) is a Texas state highway that runs from Longview northwest to Gilmer. It is also known as Gilmer Road in Gregg County.

State Highway 300
SH 300, highlighted in red
Route information
Maintained by TxDOT
Length	18.624 mi[1] (29.972 km)
Existed	August 2, 1968[1]–present
Major junctions
South end	US 80 at Longview
	Loop 281 in Longview
North end	US 271 / SH 155 at Gilmer
Location
Country	United States
State	Texas
Counties	Gregg, Upshur
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← SH 299 → SH 301

SH 300 begins at an intersection with U.S. Route 80 on the west side of Longview, and travels northwest through residential sections of the city. The route continues to the northwest, passing through agricultural sections of southeastern Upshur County before reaching its terminus at U.S. Route 271 and State Highway 155 on the far southern edge of Gilmer. The route travels nearly 19 miles.

SH 300 was previously designated on January 23, 1939 on a route from Atlanta south to Frazier Creek. On November 20, 1939, SH 300 was extended south to SH 49.^[2] The route was redesignated on December 16, 1943 as SH 43 when it was extended farther north.^[3] The current route was designated on August 2, 1968, replacing FM 1403.^[4]