Welcome to the SLOW MBO 2026 season. SLOW mountain bike events are open to everyone from beginners to experts and give you a chance to explore some of the best off road terrain in the South East of England.

Event Schedule

Date	Venue & Entry Link	Planners
22nd February	Bucklebury, Berkshire	Dave Uglow
12th April	Milland, West Sussex	Ian Norfield
31st May	Chilterns	Michael Rackham
19th July	South Downs	Adam Eyre-Walker
30th August	Hampshire	Rachel Clay
11th October	Surrey	Sid Hardy/Mark Humphrey
8th November	Surrey Hills	Jane Robinson

RESULTS 2025	General info: SLOW MBO	Event updates: Newsletter
BMBO Calendar	SLOW MBO Facebook Group	SLOW MBO Strava Club

Events will be run using the phone based app MapRun which detects and records your position. Please refer to these Instructions for setting up MapRun and using it at an event. There are also several Virtual Courses including previous events that use MapRun which you can ride at any time.

Online Entry

• Enter via SiEntries.co.uk. Please ensure that First Name and Last Name/Surname match exactly in SiEntries and the MapRun app so that your results can be found.
• Please visit bmbo.org.uk to sign up or renew your membership. Full Member costs £10 (Jan – Dec) and will give a discount on all BMBO events. Day Rider and Under 21 memberships are free.

Your age class for all 2026 events is your age on 31st Dec 2026. All results for current BMBO Day Riders and Full Members will be included in the BMBO National League.

If you would like to contact any of the organisers, email the series coordinator Dave Uglow at:

Event Details

Events are public – all are welcome. Waterproof 1:25,000 Ordnance Survey format maps will be provided. MapRun is used to record which checkpoints are visited, there are no physical markers on the ground.

The majority of riders use mountain bikes but many of the events are suitable for gravel bikes. You may gain on the smoother sections but have to go more slowly on rougher tracks. If you’re not familiar with the terrain at an event location please contact the organisers.

All riders must wear a helmet and carry a whistle, mobile phone and first aid kit (a minimum of plasters & dressings). The following equipment is also recommended:

• Waterproof top
• Compass and map board or cardboard to support the map on your handlebars.

British Mountain Bike Orienteering (BMBO) rules will be used which competitors are advised to read in advance.

Entry Classes

• Solos
  E-Bike
  M20/W20 = Youth 15 to 20
  M21/W21 = 21 to 39
  M40/W40 = 40 to 49
  M50/W50 = 50 to 59
  M60/W60 = 60 to 69
  M70/W70 = 70+
• Pairs, Mixed Pairs
  E-Bike
  M20/W20, MIX20 = Youth 15 to 20, combined age 30 to 40
  M21/W21, MIX21 = combined age 36 to 79
  M40/W40, MIX40 = combined age 80 to 99
  M50/W50, MIX50 = combined age 100 to 119
  M60/W60, MIX60 = combined age 120+
• Teams of 2-4
  GEN = Generation (Junior/Youth 12-17 accompanied at all times by Adult 18+)

Series Prizes

Series prizes will be presented to the 1st, 2nd and 3rd placed riders in the following categories:

• Class A: M21, M40
• Class B: M50
• Class C: M60, W21, W40
• Class D: M70, W50, W60, W70
• Class Y: M20, W20

Series rankings are based on your top 3 scores from this years events. To qualify for prizes or rankings, participants must have attended at least 2 events.

Penalties

The BMBO graduated penalty scheme is used for SLOW events.

1 to 5 minutes late – lose 1 point per minute
6 to 10 minutes late – lose 2 points per minute
11 to 15 minutes late – lose 5 points per minute
16 to 30 minutes late – lose 10 points per minute
Over 30 minutes late – lose all points

Routes

Listed below are the most common route options. See Map Symbols for a more detailed list of valid routes on an OS 1:25,000 scale map.