Maryland Route 650

Maryland Route 650
Maryland Route 650 highlighted in red
Route information
Maintained by MDSHA
Length	25.89 mi[1] (41.67 km)
Existed	1939–present
Major junctions
South end	New Hampshire Avenue at the District of Columbia boundary in Takoma Park
Major intersections	MD 410 in Takoma Park MD 193 in Langley Park I-495 in Hillandale US 29 in White Oak Randolph Road in Colesville MD 200 Toll in Colesville MD 198 in Spencerville MD 108 in Ashton MD 97 in Sunshine
North end	MD 108 in Etchison
Location
Country	United States
State	Maryland
Counties	Prince George's, Montgomery
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 648 → MD 652

Maryland Route 650 (MD 650) is a state highway in the U.S. state of Maryland. Known as New Hampshire Avenue for most of its length, the state highway runs 25.89 mi (41.67 km) from Eastern Avenue at the Washington, D.C. border north to MD 108 in Etchison. MD 650 serves as a major north-south commuter route in northwestern Prince George's County and eastern Montgomery County, connecting the District of Columbia with the residential suburbs of Takoma Park, Langley Park, Adelphi, Hillandale, White Oak, and Colesville. By contrast, the part of MD 650 north of Spencerville is a quiet rural road connecting several small communities along the northeastern fringe of Montgomery County.

MD 650 was originally built between Takoma Park and Adelphi in the late 1930s as an extension of New Hampshire Avenue out of Washington. In the 1950s, the state highway was extended north, taking over portions of MD 320 and U.S. Route 29 (US 29) and all of MD 116. Beginning in the 1950s and continuing through the 1990s, MD 650 has been expanded to a multi-lane divided highway in stages from its southern terminus north to Spencerville.