When does the The Mermaid Run sell out?

The Mermaid Run hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

Road

The Mermaid Run

Q: How hard is the The Mermaid Run 5K?

The Mermaid Run is a 5K on a road course in Aberdeen, Maryland. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the The Mermaid Run?

Race-day weather in Aberdeen can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 8:00 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

August 22, 2026

Aberdeen, Maryland

Rolling Course

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PR-friendly

About the Race

Registration is now open! The 2026 Mermaid Run is scheduled for Saturday, August 22, 2026 at Festival Park in Aberdeen, MD 5K Race start is 8:00 am, followed by the Mermaid Mile start soon after The 5K Race will be professionally chip-timed by Blue Cheetah Sports Timing and offers a marathon-quality 5k finisher's medal and event shirt for all participants. The course is USATF Certified - Fast and FLAT! Costumes are encouraged, and we will have music and prizes! Check out www.themermaidrun.com...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

road

Surface

Road

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Vibe & community

music

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

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Common questions

How hard is the The Mermaid Run 5K?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.