Sligo Creek Parkway begins at MD 650 in Takoma Park. The parkway heads west as a two-lane road with a speed limit of, paralleling Sligo Creek and the Sligo Creek Trail to the south. At a southward bend of Sligo Creek, Flower Avenue continues straight while Sligo Creek Parkway turns south. After returning to a westward heading, the parkway intersects Old Carroll Avenue, which is used to access MD 195, which passes above the parkway on the Carroll Avenue Bridge. Old Carroll Avenue is also the southern limit of road closure on Sundays. When Sligo Creek Parkway reaches Maple Avenue, the parkway becomes concurrent with Maple Avenue and crosses Sligo Creek and the Sligo Creek Trail at grade. From this point, the creek and trail remain south of the parkway. At the next intersection, Maple Avenue continues north, an entrance to Washington Adventist Hospital is on the east, and Sligo Creek Parkway heads west. Sligo Creek Parkway continues northwest through Takoma Park on a stretch featuring many blind curves. After the curvy section, the parkway temporarily turns west and intersects MD 320, which is the northern limit of road closure on Sundays. Sligo Creek Parkway resumes its northwest course through Silver Spring and meets MD 594. Beyond Wayne Avenue, the parkway comes to a three-way stop at Schuyler Road and speed humps start crossing the road at regular intervals. Houses also line the east side of the parkway leading up to the five-way intersection with U.S. Route 29. The parkway continues northwest, passing Brunett Avenue, then turns north and parallels the Sligo Creek Golf Course. Sligo Creek Parkway passes under the Capital Beltway before intersecting Forest Glen Road. After meeting Dennis Avenue at a four-way stop, the parkway continues north to its terminus at MD 193 in Wheaton. The average gradient of the parkway is.75%, with occasional sections exceeding 4%; generally the parkway becomes steeper and more undulating as one approaches the southern terminus. The stretch immediately south of Piney Branch/MD-320 is fairly steep, as is the area around the intersection with Old Carroll Ave. The total elevation difference/change on the parkway is 220 feet, with the northern terminus being 345 feet above sea level at University Blvd., and the southern terminus being 225 feet above sea level at New Hampshire Avenue.
