About this Location

Facility Overview

The Gaithersburg Diamond Ave. Park & Ride (often referenced as Gaithersburg P+R) is a primary public transit commuter facility located at 580 W Diamond Avenue in Gaithersburg, Montgomery County, Maryland. Operated under state and county transit authority coordination, the facility is designed as a sprawling, level, open-air surface parking lot. Because it is completely open without overhead concrete structures, there are no vertical clearance barriers, providing unrestricted overhead clearance. This open layout makes it completely accessible not only for standard sedans, compacts, and midsize crossovers, but also for full-sized pickup trucks, tall SUVs, utility work vans, and commercial commuter vehicles. The parking stalls are clearly striped and organized along wide drive aisles that simplify maneuvering and parking even during brisk morning commute hours.

Prime Location & Nearby Attractions

Strategically positioned near the intersection of MD-117 (West Diamond Avenue) and Interstate 270, the facility sits at the cross-section of Gaithersburg\'s commercial corridor and residential neighborhoods. Key destinations in the immediate vicinity and surrounding area include:

National Institute of Standards and Technology (NIST): Located less than 1.5 miles to the west along Clopper Road / West Diamond Avenue, making it a convenient staging and meeting location for contractors and employees.
Old Town Gaithersburg & Gaithersburg MARC Station: Approximately 1.2 miles east, providing access to historic central Gaithersburg, local restaurants, civic offices, and the MARC Brunswick commuter rail line.
Montgomery County Agricultural Fairgrounds: Situated roughly 1.5 miles southeast, hosting major regional festivals, craft shows, and seasonal county fairs.
Rio Lakefront & Downtown Crown: Located approximately 3.5 miles south via I-270 or Sam Eig Highway, offering prime waterfront dining, shopping, cinemas, and entertainment.
Seneca Creek State Park: Positioned just 2 miles to the west, featuring extensive trails, lake access, and outdoor recreation.

Access, Navigation & Transit Connectivity

Ingress and egress are straightforward via signalized access along West Diamond Avenue (MD-117), positioned right next to Interstate 270 at Exit 10 (MD-117 / Clopper Road). Commuters benefit from direct slip access onto I-270 northbound toward Frederick and southbound toward the Capital Beltway (I-495) and Washington, D.C. As a transit interchange hub, the lot hosts multiple Maryland Transit Administration (MTA) Commuter Bus lines (including Routes 505 and 515 connecting Hagerstown, Frederick, and Shady Grove) alongside Montgomery County Ride On local bus services. Regular feeder bus loops transport passengers south directly to the Shady Grove WMATA Metrorail Station (Red Line terminus) in approximately 10 to 15 minutes, allowing drivers to bypass congested highway corridors altogether.

Facility Amenities & Key Features

The Gaithersburg Diamond Ave. Park & Ride delivers an array of standard commuter-focused features:

Surface-Level Open Parking: Expansive single-level asphalt surface with high vehicle capacity and zero clearance limitations.
Public Transit Connections: On-site bus shelters with schedule displays, passenger boarding benches, and direct feeder routes to regional rail.
Designated ADA Accessible Stalls: Plentiful clearly signed and marked disability parking spaces located near pedestrian walkways and bus stop shelters.
Public Area Lighting: High-mast exterior illumination providing visibility throughout dark early morning and late evening hours.
Free Commuter Parking: Open municipal park-and-ride privileges offered at no charge for carpoolers and transit commuters.

Ideal For

Daily DC & Montgomery County Commuters: Drivers wishing to avoid inner-beltway traffic by parking and boarding direct express buses or Metrorail feeder shuttles.
Carpool & Vanpool Formations: Ideal neutral meeting point along the I-270 technology corridor for organized rideshares heading to Bethesda, Rockville, or Northern Virginia.
NIST and Biotech Corridor Visitors: Convenient staging lot for corporate and institutional visitors operating along West Diamond Avenue and Clopper Road.
Regional Event Visitors: Practical parking alternative for travelers attending special events at Old Town Gaithersburg or the Agricultural Fairgrounds.

Visitor & Driver Tips

To ensure a seamless visit, motorists should aim to arrive before 7:30 AM during Tuesday through Thursday workdays, when commuter demand peaks. Use designated crosswalks to access on-site bus platforms safely, and check real-time transit schedules via the MTA CharmPass or WMATA/Ride On transit apps. While overnight commuter parking is typically permitted for valid transit riders, avoid leaving valuables in plain view inside parked vehicles. For navigation systems, enter 580 W Diamond Ave, Gaithersburg, MD, to be guided directly to the primary signalized driveway.