State Highway 87 is a highway in southeastern Oklahoma, running for 14.58 miles (23.46 km).^[1] It passes through the extreme southeastern corner of the state, running entirely through McCurtain Co. It has no lettered spur routes.

Quick Facts State Highway 87, Route information ...

State Highway 87
Route information
Maintained by ODOT
Length	14.58 mi[1] (23.46 km)
Major junctions
West end	US 259 near Harris
East end	AR 108 at the Arkansas state line
Location
Country	United States
State	Oklahoma
Highway system
Oklahoma State Highway System Interstate US State Turnpikes
← SH-86 → SH-88

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SH-87 begins at an intersection with US-259 near the unincorporated community of Harris, about 1 mile (1.6 km) from the Red River. SH-87 heads east from here, proceeding along many curves. The highway is two-lane for its entire length, and much of it is very narrow with no shoulders (though a short stretch of highway that was realigned to approach a new girder bridge that replaced an old through truss bridge was built with shoulders). The highway crosses no major rivers, but does bridge Walnut Bayou. SH-87 ends at the Arkansas state line, where it becomes Arkansas Highway 108.

SH-87 is shown on the Oklahoma state highway map as concurrent with US-259 to at least Idabel.^[2] However, this is an error, as the highway is only signed from US-259 to the Arkansas state line, and is shown on ODOT's internal control section maps as ending at US-259.^[1]

State Highway 87 first appeared on the June 1944 state highway map. When it was originally commissioned, the highway was a spur route; its western end was in Idabel, and its eastern end was approximately the location of the present-day US-259–SH-87 intersection. Towards the end of its route, SH-87 served Harris.^[3]

By 1948, SH-87 was extended, setting its eastern terminus at its present location at the Arkansas state line.^[4] However, this terminus proved to be temporary at first, as the highway was rerouted to turn north to end at SH-21 (now SH-3) in Tom in 1952.^[5] However, by 1957, the state line terminus had been reestablished, and SH-87 has ended there to the present day.^[6]

In the early 1960s, SH-87's length was at its zenith, as the highway stretched from Idabel to the Arkansas state line. However, on 1963-01-07, US-259 was established.^[7][8] The section of SH-87 from Idabel through Harris was turned over to the new U.S. route, setting the western terminus of the highway to its present-day location.