I'm Bound for Boston Marathon & Half Marathon - Denver

Course

A USATF-certified one-mile loop around Northfield High School in Denver, run 26 times for the marathon and 13 times for the half before a final sprint to the finish. The organiser describes it as flat and fast and pitches it as a Boston qualifier, with mile-split clocks positioned along the loop. The race starts at 6:30 am and the course closes at 10:30 am.

Key dates

• !
  Registration
  Open now
• ★
  Race day
  Sun 1 Aug 2027

About

I'm Bound for Boston is a marathon and half marathon run on a flat one-mile loop at Northfield High School in Denver. The USATF-certified course is aimed at runners chasing a Boston Marathon qualifying time, and virtual entries are offered alongside the in-person races.

• 

  High Five 100

  August 2027 · Lake City, CO · 100 Miler
  Save
• 

  Wild West Relay

  Fri 6 Aug 2027 · Fort Collins, CO · Marathon · Half Marathon · 10K · 5K

  200-mile relay over Colorado mountain passes to Steamboat

  Save
• 

  Summer Sizzler- Denver

  Sat 7 Aug 2027 · Denver, CO · 15K · 10k · 5k
  Save
• 

  All-Out Runapalooza

  Sat 7 Aug 2027 · Arvada, CO · Half Marathon · 10K · 5K
  Save

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.