About MBO Score

Held on Sunday mornings throughout the year, these are 2 or 3 hour score orienteering events on a bike, located primarily in the Surrey Hills (with the odd excursion to the Chilterns or South Downs). Events are run by London & South East Adventure Racers in affiliation with SLOW.

Details of the 2019 Series

Events SLOW BMBO facebook
Results SLOW BMBO 2019 Series
General Discussion London & South East Adventure Racers
Event Updates Newsletter

Who are London & South East Adventure Racers?

We are a local community with a shared interest in multi-sport racing. While our focus is adventure racing, our members participate in everything from mountain marathons, trail running, kayaking, mountain bike and foot orienteering, climbing, sportives and more.

What is a MBO Score Event?

MBO Score is a fun and exciting form of orienteering on bikes. Unlike MTBO which uses specialist maps, MBO Score uses regular 1:25,000 scale Ordnance Survey maps which are more familiar to most people. Primarily off-road events, a mountain bike is the preferred choice, however hybrids and cross-bikes can also be used.
Depending on the event, between 2 and 7 hours are allowed to visit as many control sites as possible in order to maximise the points total, making route choice and navigational skills a high priority.

Events are open to all abilities and ages and riders can enter as either solo or pairs.

Where are the Events held?

Events are held in various locations around the Southeast where sufficient space and interesting terrain is on offer. Event venues will usually be a pub or sports centre.

What does the map look like?

Competitors are given a pre-printed 1:25,000 Ordnance Survey map with around 24 control points of varying point value positioned on bridleways, byways or forestry trails.

What kit do I need?

Essential Equipment:

  • Bike! (if you are interested in taking part and don’t have a bike, please post on our Facebook wall here and someone may be able to help. Rental bikes are also available from a number of locations near race venues & we will post info when possible)
  • Bike helmet – this is mandatory equipment
  • Whistle, first aid kit

Recommended Equipment:

  • Compass
  • Watch
  • Pen or highlighter (to mark your chosen route)
  • Waterproof

How do I find a Teammate?

While you are welcome to race solo, we encourage pairs as a way of developing the sport and meeting new people. If you are looking for a teammate you can post on our Facebook group or on the SLOW Facebook page.

What is the cost?

Adult Day Rider £8 In advance / £10 EOD
BMBO / SLOW Members £7 In advance / £9 EOD
Under 21 £4 In advance / £5 EOD

Event Rules

BMBO event rules can be found here.


Orienteering in London and Surrey. British Orienteering's Club of the Year 2013. Community Amateur Sports Club accredited.