Texas State Highway 300
|Maintained by TxDOT|
|Length||18.624 mi (29.972 km)|
|Existed||August 2, 1968–present|
|South end||US 80 at Longview|
|Loop 281 in Longview|
|North end||US 271 / SH 155 at Gilmer|
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 extended south to SH 49. The route was redesignated on December 16, 1943 as SH 43 when it was extended farther north. The current route was designated on August 2, 1968, replacing FM 1403.
|Gregg||Longview||US 80 (West Marshall Avenue)|
|Loop 281 – LeTourneau University, Kilgore College, Texas Baptist College, UTT Longview, Airport|
|FM 2275 west (East George Richey Road) – Gladewater|
|Upshur||East Mountain||FM 1844 – East Mountain, Union Grove, Judson|
|FM 3358 north|
|||FM 726 – West Mountain, Glenwood|
|||FM 3358 south / Grouse Road|
|Gilmer||US 271 / SH 155 – Tyler, Gladewater, Pittsburg|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Transportation Planning and Programming Division (n.d.). "State Highway No. 300". Highway Designation Files. Texas Department of Transportation. Retrieved November 1, 2010.
- (PDF) https://publicdocs.txdot.gov/minord/MinuteOrderDocLib/003676256.pdf. Missing or empty
- Transportation Planning and Programming Division (n.d.). "State Highway No. 43". Highway Designation Files. Texas Department of Transportation. Retrieved June 21, 2017.
- Transportation Planning and Programming Division (n.d.). "Farm to Market Road No. 1403". Highway Designation Files. Texas Department of Transportation. Retrieved June 21, 2017.