Seneca Creek Greenway Trail Marathon & 50K

Course

Singletrack dirt trail over rolling hills in Seneca Creek State Park, starting and finishing at the Nuthatch Pavilion in Gaithersburg. Marathon and 50K run together until mile 27, where runners either finish or add a loop of Clopper Lake for the ultra distance. Expect mud, ice, rocks, roots and slick crossings, and about 2,200 ft of climb. Drop bag at the Berryville Road aid station.

Key dates

• ·
  Registration
  Not open yet
• ★
  Race day
  Sat 6 Mar 2027

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  B&A Trail Marathon and Half Marathon

  Sun 7 Mar 2027 · Severna Park, MD · Marathon · Half Marathon

  Runs the old Baltimore & Annapolis rail trail

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  St. Patrick's Day Shamrock 5K

  Sun 14 Mar 2027 · Baltimore, MD · 5K

  Part of Baltimore's St. Patrick's Day Parade weekend

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  HAT Run 50K

  Sat 20 Mar 2027 · Havre de Grace, MD · 50K

  Two singletrack loops with four stream crossings

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  Annapolis Running Festival

  Sat 20 Mar 2027 · Annapolis, MD · Half Marathon · 10K · 5K

  Road race through historic downtown Annapolis

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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.