Oklahoma State Highway 99

State Highway 99 marker
State Highway 99
Route information
Maintained by ODOT
Length241.5 mi[3] (388.7 km)
ExistedMay 17, 1938[1]–present
HistoryPreviously SH-48 January 19, 1927 – May 16, 1938[2]
Major junctions
South end US 377 at the Texas state line
Major intersections
North end K-99 at the Kansas state line
Location
CountryUnited States
StateOklahoma
CountiesMarshall, Johnston, Pontotoc, Seminole, Pottawatomie, Lincoln, Payne, Creek, Pawnee, Osage
Highway system
  • Oklahoma State Highway System
← SH-98→ SH-100
← SH-325US-377→ US 385
Northbound in Seminole, Oklahoma

State Highway 99 (SH-99) is a north–south state highway through central Oklahoma. It runs from the Texas state line at Lake Texoma to the Kansas state line near Lake Hulah. It is 241.5 miles (388.7 km) long. The highway overlaps U.S. Highway 377 (US-377) for over half its length.

SH-99 continues as K-99 after crossing the border into Kansas. This road continues for 233 miles (375 km) to the Nebraska border, where it becomes Nebraska Highway 99, which lasts an additional 14 miles (23 km). Thus, SH-99 is part of a triple-state highway numbered "99", which lasts a total of 488 miles (785 km).

SH-99 began as SH-48, a short highway connecting Ada to Holdenville. This highway was gradually expanded until it became a border-to-border route. In 1938, it was renumbered to match K-99, which was renumbered from K-11 the same day.

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  2. ^ Cite error: The named reference odot-history-48 was invoked but never defined (see the help page).
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