What categories are included in the Wild Mayo 650 Ultra cycling challenge?

Mayo Furnace 300k:

  • Male Solo 
  • Female Solo 
  • 2-person (can be mixed sex teams)

Wild Mayo 650 Ultra:

  • Male Solo 
  • Female Solo 
  • 2-person (can be mixed sex teams)
  • 3-person (can be mixed sex teams)
  • 4-person (can be mixed sex teams)


Both solos and teams will carry a GPS tracker to ensure accuracy and fair play.

Start and Finish details.

Both races will start and finish in the grounds of Westport House.

First off 7am Mayo Furnace 300: Solo riders will depart at 3 min intervals, followed by the 2 person teams.

First off 10am Wild Mayo 650: Solo riders will depart at 3 min intervals, followed by 2, 3 and 4 person teams. 

We want most riders finishing in daylight hours, so we have decided to start the 300k first and the 650 participants after. This will add to the finishers experience as there will be more supporters around to clap you home and complement your great achievement. 

Individual start times will be listed on the website after July 1st 2021.

When does registration close?

June 30th 2021 Race numbers are limited so this might close earlier.

What are the time allowances for the Wild Mayo Ultra and Furnace?

The Mayo Furnace 300 cut off is 18 hours for solo male and 22 hours for solo female.

Cut off time for 2-person team is 20 hours.

The Wild Mayo 650 cut off is 38 hours for solo male and 43 hours for solo female.

Cut off time for 2 & 3 person teams is 38 hours. Cut off time for 4 person team is 32 hours.


What kind of a support crew do I need?

For the Mayo Furnace 300- solo and 2-person category – a participant or team can do it with no support but we recommend a support vehicle.

For the Wild Mayo 650 – solo riders and 2 & 4 person teams – you will need a minimum of 1 vehicle and 2 crew members (with valid driving licence and insurance) although we would strongly suggest that you have more.

Crew members generally share the responsibilities of driving, navigation and nutrition.

Bear in mind that if you are participating as a 2-person team, when a rider has finished their section they may assume crew responsibilities.

All persons involved with driving or cycling in this event must have current Cycling Ireland membership. 

What kind of a support vehicle should I use?

Please SEE RULES for all vehicle requirements. Motorhomes or motorcycles cannot be used as a support vehicle.

What are night hours?

Night hours are designated from 19:00 to 7:00AM. During this time the vehicle must follow the rider directly at all times. This is critical for safety purposes. If for some reason the crew need to stop, the rider must stop along with the crew. A rider cannot proceed along the route independently for any distance during night hours. There are no exceptions. Penalties will be instantly applied by course marshals without prior warning.

Please note all crew members and riders must wear reflective clothing during night hours.

SEE RULES in relation to follow vehicle auxiliary lighting during night hours.

How do I follow the route?

You can download the detailed route book and GPS file from this site after July 1st, 2021. You will also receive a detailed route book as part of your race package on July 7th, 2021.


Many riders and crew will navigate and validate their navigation using both the route book and the GPS file. The route book is the most important navigation tool. If you experience GPS discrepancies for any reason rely on your route book.

Navigation is often a challenging aspect of endurance racing so please schedule time pre-race to understand the route. Going off-course is a stressful occurrence.

What is data network coverage like on the route?

There are short sections throughout the course that have no data or cell phone coverage. We have endeavored to place timing stations in areas where there is sufficient coverage.

In those sections with poor coverage please expect GPS tracker uploads, and therefore race information, to be temporarily slower.

What is scrutiny and rider-crew sign-on?

Between 18:00 and 21:00 Friday July 23rd, each solo rider or one rider in a 2-person team and one designated crew representative must present themselves at the Hotel Westport with ALL required paperwork to receive their race package.

Once you have received your race package the rider and/or the crew representative may proceed to bicycle and car scrutiny.

Scrutiny – covers all bicycles including wheels and cars. It is a vital safety check and must be respected. If equipment and the vehicle do not meet requirements the rider/team cannot race. No exceptions. Please see RULES for all information regarding equipment requirements.

All bikes and vehicles must be scrutinized (please see rules) on Friday July 23rd 2021. Scrutiny will take place at Hotel Westport car park. 

Bike and vehicle scrutiny will take place Friday July 23rd between 18:00 and 21:00. It will run on a first come first served basis. Generally each scrutiny will take 15-25 minutes. If equipment or vehicle does not pass scrutiny, additional time may be allotted allowing the rider/team to make satisfactory adjustments.

What are the rider and crew briefings?

The briefing will take place at the Hotel Westport at 21:00, July 23rd, 2021. It is mandatory for solo riders (or 1 rider from a team) and at least one crew member to attend. It is the responsibility of each team to ensure that information is shared amongst all team members. We will endeavor to make this meeting as efficient as possible so you can plan for an early evening.

It is also a chance to be introduced to your fellow riders and crews during the official sign-on.


What happens if one of our team members drops out of the race?

You will get an official time as long as one member of the team finishes the full distance.

Is there a minimum distance that each team member must ride?

No. Riding strategy is at team discretion.

What are the timing stations?

The position of all cyclists will be monitored through Web tracking.

In order to ensure accurate timing, cyclists must be escorted by their support car whenever they pass a time station. The arrival time at all time stations must also be noted in the route Official Route Book, and the crew MUST contact the supplied mobile number via text with the team number, station they are at, and the time they are at it. Eg. Team 24 T.S 5 17.36

We have endeavoured to ensure that there is adequate GPS (and cell phone) coverage at each timing station for efficient data upload. Please be aware that while each timing station has cell phone coverage it may not extend past that point.

Will the race be marshalled?

On junctions etc NO,  but we will have checkers out on route to make sure the rules are been abided. 

There will be teams of travelling marshal’s en-route. It is your responsibility to make sure all crew members read the rulebook. Rules will be enforced strictly and time penalties will apply.

There is a strict no drafting policy.