Previously SH-48 January 19, 1927 – May 16, 1938[2]
Major junctions
South end
US 377 at the Texas state line
Major intersections
US 70 in Madill
I-40 near Seminole
US 62 in Prague
I-44 / US 377 in Stroud
US 64 in Cleveland
US 60 / SH-11 in Pawhuska
North end
K-99 at the Kansas state line
Location
Country
United States
State
Oklahoma
Counties
Marshall, Johnston, Pontotoc, Seminole, Pottawatomie, Lincoln, Payne, Creek, Pawnee, Osage
Highway system
Oklahoma State Highway System
Interstate
US
State
Turnpikes
← SH-98
→ SH-100
← SH-325
US-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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Global Information
US 377 at the Texas state line
K-99 at the Kansas state line
