Listed from RunSignUp. Checked Oct 22, 2026.
Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planWho will be the last one standing?
The Baltimore Road Runners Club is thrilled to bring a sanctioned backyard ultra to the Baltimore running community by partnering with race founder Mac McComas to present the 5th annual Mackyard Ultra!
For those unfamiliar with backyard ultras, it is commonly referred to as a "last man standing" event. Runners will complete a 4.1667 mile course each hour until one person completes a lap (called a yard) by themselves. That person is the winner and only finisher of the race.
The race will take place at Shawan Downs on their cross country course, so be ready to run on grass with plenty of ups, downs, twists, and turns to keep you engaged on each out and back lap.
Registration opens
Aug 2, 2026
Registration closes
Oct 28, 2026
Standard ends
Oct 28, 2026
Race day
Oct 31, 2026
Current price
$25
Standard
Ends
Oct 28, 2026
Registration openings and major changes, like a new date or a cancellation.
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
Nov 7Germantown, MDHalf Marathon, 10K +1
39 mi from The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, similar trail technicality to The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, registration open
Nov 7Montgomery Village, MD50 mi
36 mi from The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, similar trail technicality to The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, registration open
Nov 7Newtown Square, PA5K, 1.4 mi
75 mi from The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, similar trail technicality to The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, registration open
Nov 7Woodbine, NJ24 hr, 12 hr +1
100 mi from The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, similar trail technicality to The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club, registration open
Straight-line distance
Oct 24Baltimore, MD50K, 25K
Oct 30Salisbury, MDTrail Race
Nov 1Little Orleans, MD50K, 25K
Nov 7Thurmont, MD11 mi
Nov 7Montgomery Village, MD50 mi
Nov 7Germantown, MDHalf Marathon, 10K +1
Nov 14Upper Marlboro, MD50K, 20K
Nov 21Boonsboro, MD50.2 mi
Nov 21Queen Anne, MD25K
Feb 6, 2027Elkridge, MD50K
Feb 27, 2027Leonardtown, MD50K, 34K +1
Mar 6, 2027Clarksburg, MD8 hr
Apr 17, 2027Sykesville, MD8 hr, 50K +2
Nov 22Glen Rock, PAHalf Marathon, 6.66 mi
Mar 13, 2027Hanover, PA50K, 25K +1
Sep 18, 2027Hanover, PA40 mi, 25K +1
Dec 5York, PA9 mi
Mar 20, 2027Havre de Grace, MD50K
Oct 24Earlysville, VABackyard Ultra
Oct 24Waterville, PA25K, 10K
Oct 24Pottstown, PA30K, 15K
Oct 24Crozet, VA10K, 5K
Oct 24Pittsgrove, NJHalf Marathon, 3.95 mi
Oct 24Slatington, PA10K, 2 mi
Oct 24Flourtown, PA5K
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Build my planAre you the race director for The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club?
Claim this race to manage registration, volunteers, and race day.
