Updated 14th February 2023

What races/events can I take part in?

Age 17+ EXTREME 75km Day 1 & 60km Day 2
Age 17+ WILD 70km Day 1 & 60km Day 2
Age 16+ CLASSIC / E-BIKE 60km
Age 14+ RUSH / E-BIKE 57km
Age 10+ SLIDE 39km
Age 9-12yrs Mini 10to4 Race 1 12km
Age 6-12yrs Mini 10to4 Race 2 8km
Age 6-8yrs Mini 10to4 Race 3 4km
Age 4-6yrs Mini 10to4 Race 4 1km obstacle course

What is the cost of entry and add-ons?

Event Entry Fee
EXTREME KSh 30,000
WILD KSh 30,000
RUSH / E-BIKE KSh 24,000
SLIDE KSh 16,000
Mini 10to4 1km - KSh 4,000
4, 8 & 12km  - KSh 5,000

Bike Drop - Friday night KSh 3,000 per bike, Saturday morning KSh 2,000 per rider

Camping at Borana Race Village - KSh 2,000 per person, children under 12 stay for free

Carbon offsetting - KSh 1,000 per 10 trees

When are the early rates valid until?

Registration closed on 31st January at midnight

When do entries close?

Entries closed on Tuesday 31st January 2023 at midnight.

If you would like to enter a race in the 2023 Tropic Air 10to4 Mountain Bike Challenge but were unable to register before the closing date, please get in touch as we may be able to accept late entries if places become available due to cancellations.  Please note, however, that there will be a 15% surcharge for all late entries, and you won't get a tee-shirt as the order was submitted on 1st February.


What is the cancellation policy?

For Race Fees and all extras - i.e. bike drop, camping, AMREF, etc. - this can be found here - Tropic Air 10to4 Cancellation Policy

Why is my entry not being accepted?

Registration is now closed.

What methods of payment can I use?

Paybill number: 329959
Account number: Competitor's full name
Amount: xxx

Name of Account: The Bill Woodley Mount Kenya Company Ltd
Bank Name: Standard Chartered Bank Ltd
Account Number: 0102833190000
Branch: Langata
Bank Code: 02

Name of Account: Mount Kenya Trust
Account No. 42303530
Sort Code: 15-99-00
IBAN: GB89HOAB15990042303530

Payable to: Bill Woodley Mount Kenya Company.
Deliver to: Mount Kenya Trust, Greystones Offices, Turaco Farm, PO Box 690-10400, Nanyuki, Kenya or deposit at any branch of Standard Chartered Bank - account number: 0102833190000

If you are unable to use any of these methods, please contact to discuss alternatives.

You must pay within 48 hours of submitting your entry.  If we do not receive your full payment by midnight on 16th February at the very latest, your entry will be cancelled.

What is the maximum amount I can pay by MPESA?

Please note MPESA has a single transaction limit of Ksh 150,000 and a daily transaction limit of Ksh 300,000 so unless you're registering for several people this shouldn't be a problem. If your collective payments do exceed the upper limit, we suggest you spread the registrations over a couple of days. 

How will I know that my application has gone through?

Once you have submitted your entry form and completed the payment you will receive an email confirming your entry. If you go through the process but do not receive a confirmation email and you've checked your Spam box, please contact us at

Do I need to be vaccinated against Covid-19?

All adults 18+ years old should be vaccinated against Covid-19 before entering the site either as a competitor or spectator.

At time of going to press, there are no Covid restrictions in place relating to public gatherings or events of this sort. However, if that changes we will be obliged to follow Govt. guidance and will inform you of anything that you need to do to comply.

Must I purchase AMREF medical insurance in order to participate?

No, but we highly recommend that you do if you do not have any prior medical or evacuation insurance cover.  Without prior cover, emergency medical evacuation can cost over $4000, which must be paid BEFORE treatment or flight.  In an emergency, if there are issues with payment, this can be life threatening.  You can purchase AMREF medical evacuation cover for the event at a very reasonable rate through the online registration form.

Am I required to fundraise?

There is no minimum fundraising requirement for participants, but we highly encourage all our participants to fundraise for the causes that the 10to4 supports. We will be publishing materials to help your fundraising efforts over the next few weeks.

I'd like to sponsor the event, where can I find more information?

Please contact if you'd like to find out more about our range of sponsorship opportunities.

Is there accommodation available at Borana Race Village?

Borana Race Village will once again be open for camping in 2023.  Full details will be published in the next few weeks, and you can book camping when you register.

Are you offering the bike drop service?

Bike drop and competitor transfer service was offered for all Day 2 riders. If you signed up for this, you will drop your bike at Event Registration in the afternoon/evening and it will be transported overnight to the Start point ready for the following day's races.

The following day, if you booked rider transfer you'll get a bus from Borana Race Village to the Start Line at Kisima.  Otherwise, you'll either need to find your own way up to the Start point in good time to collect your bike before your race starts. 

Full details can be found on the Bike Drop page. 

Bike Drop and Rider transport is now fully booked.

When and where is onsite registration?

We will be offering pre-event registration for ALL EVENTS and would GREATLY encourage you to take advantage of this if you can and avoid the queues!  Details of times and locations will be published nearer the time, so you can come along at your convenience to register yourself (and your family) and collect your pre-allocated bike tag, 10to4 t-shirt and other goodies.

As always there will be onsite pre-race registration (details to follow), but we really want to keep the queues down so please assist us with this by registering early.  You can speed up the process even more if you complete and submit your Medical Form and Waiver Form online before you come along.

Can family members access Borana Race Village and do they have to pay for entry?

Yes, family members will be able to access Borana Race Village (BRV) on the Friday and Saturday to assist with drop off/pick up and they will not have to pay for entry.  Down at the Race Village, there will be options to purchase drinks and refreshments and, we hope, lots of things to keep them entertained while competitors are busy on the mountain!

Will there be food/drinks available at the Saturday Start Line and down at Borana Race Village?

Dorman's will have their coffee stand up at the Start Line as usual, so you won't have to race without your morning fix. There will also be a toilet somewhere nearby, but no other facilities will be available so please make sure you bring enough water and snacks to get you to the first water stop.

There will be a variety of refreshments and activities on offer at Borana Race Village - full details will be shared as they are confirmed.

Basic shower and toilet facilities will be available at BRV along with ample parking, but NO drinking water except for competitors as they finish their races so please ensure you bring enough for your camping requirements. We would also ask you NOT to wash bikes off using the campsite water supply.

I’d like to speak to someone from the 10to4 Team

If you have any questions about your entry or the event please don’t hesitate to email us ( including your phone number and someone will call you back as soon as possible.

If you need to speak to someone nearer the time, there will be a dedicated number for you to call during normal office hours (9am to 5pm Monday to Friday).