Gaithersburg
- 21
- 21
- 143 km
- 5
Routes of public transport
- Commuter Bus 201: BWI Marshall Airport (weekday trips 10-15)
- Commuter Bus 201: BWI Marshall Airport (weekday trips 1-3)
- Commuter Bus 201: BWI Marshall Airport (weekday trips 4-9; weekend trips)
- Commuter Bus 201: Gaithersburg Park & Ride (weekday trips 16-19;24;33; weekend trips)
- Commuter Bus 201: Gaithersburg Park & Ride (weekday trips 20-23;25-32;34)
- Commuter Bus 204: College Park
- Commuter Bus 204: Frederick
- Commuter Bus 505: Hagerstown/Myersville (trips 10-17)
- Commuter Bus 505: Hagerstown/Myersville (trips 9;18 via Urbana/Monocacy)
- Commuter Bus 505: Shady Grove/Rock Spring Business Park
- Commuter Bus 515: Frederick/Urbana
- Commuter Bus 515: Shady Grove/Rock Spring Business Park
- Flixbus 2668: Columbus => Washington, D.C.
- Flixbus 2668: Washington, D.C. => Columbus
- MARC Brunswick Line: Frederick => Washington
- MARC Brunswick Line: Martinsburg => Washington
- MARC Brunswick Line: Washington => Frederick
- MARC Brunswick Line: Washington => Martinsburg
- Ride On 100
- Ride On 43
- Ride On 65
Stops
Points of interest
- PEPCO Community Stage
- Madras Palace
- Hibachi Sushi Supreme Buffet
- Einstein Bros. Bagels
- Shanghai Famous Foods
- Jimmy John's
- Duck Donuts
- The UPS Store
- CP&A Gaithersburg
- Five Guys
- Mid-Atlantic Federal Credit Union
- Starbucks
- SM&H OBGYN
- Taco Daddy Cantina
- Shell
- Grace United Methodist Church
- Montgomery County
- Gaithersburg
- Buffalo Wild Wings
- Korean Methodist
- Felicita Restaurant & Club
- Ernie's
- Quincy's Bar & Grille
- Gaithersburg Police Station
- Saint Martins School
- Gaithersburg City Hall
- Saint Martins Catholic Church
- United States Post Office
- Concert Pavilion
- Lumpia Filipino Restaurant