Miami Backyard Ultra Online Registration

Registrant #1

Who are you registering? *

First Name *

Last Name *

New RunSignup account details

Email Address *

Confirm Email *

Create Password *

Must meet two of the following requirements: Must meet three of the following requirements:

Requirements Met

Confirm Password *

Passwords Match

Date of Birth *

Format: mm/dd/yyyy

Used for age group calculations

Gender *

Male Female

Non-Binary Prefer Not to Say

Phone *

Valid formats include: 000-000-0000 or 0000000000

Street Address *

Country *

Zip Code *

City *

State *

Choose Your Race *

Backyard Ultra

$249.00 + $15.94 SignUp Fee

(Group Pricing)

CAME TO FIND OUT.

One 4.167-mile yard every hour at Miami Marine Stadium / Virginia Key. Everyone starts under the same rules. Come to find out what the next yard holds.

December 19, 2026 / 8:00 AM EST
Miami Marine Stadium / Virginia Key
Field capacity: 500 runners

Complete each yard in less than one hour, be inside the corral at the bell and start with the field. No late starts, skipped yards, pacers or personal aid during a yard. The race is open-ended. The winner must complete one more yard than everyone else; all other runners technically record a DNF, with completed yards as their official result.

Final parking, packet pickup, crew, basecamp and aid procedures will be published in the Athlete Guide. Participant award details coming soon.

Read the full rules / FAQ

Register For
Miami Backyard Ultra

Registrant #1

Warning! You are editing the account information for .

New RunSignup account details

Choose Your Race *

CAME TO FIND OUT.