The Limitless Challenge

Now in its second year, the Adaptive Athlete Limitless Challenge brings adaptive athletes from across the British Obstacle Sports adaptive community together in an fun, distance-based points competition across the season.

Race Series Point System

1. Athletes must have a classifiable impairment, as defined by the FISO classification system. Adaptive athletes are not separated into different categories for the series, but rather compete together.
2. Athletes can complete any licensed event in the UK and score points in the Limitless Challenge.
3. All races are scored at one point per advertised and completed kilometre. However, there is a minimum score of five points. In effect, additional “bonus” points are only scored once an athlete has completed a race of six kilometres or more.
4. Points are assigned based on the official advertised distance, not the athlete’s tracked distance. For example, a Spartan Beast would score 21 points.
5. Points are allocated once evidence is submitted via the required Google Form.
6. Points are rounded to the nearest whole number.
7. Points must be claimed by the athlete within 14 days of the event, excluding events in December, which must be claimed within 24 hours of the event.
8. Athletes must be British Obstacle Sports members within 14 days of the event, excluding events in December, where membership must be held within 24 hours of the event.

Overall Race Series Winners

The winners will be decided by the total amount of points accrued between the 1st of January and 31st of December 2026.

Tie Break Procedure

The tie break procedure will be used to separate the top 3 positions in the series. In the event of a tie, the athlete who has completed the most events will be ranked above those with the same distance.

Race Series Prizes

The top 3 overall (note there is no male and female split) will be awarded at the end of the season.

British Obstacle Sports membership

There is no requirement to be a British Obstacle Sports member to compete in a particular event, unless required by the race organiser. However, athletes must hold an Adult or Under 18 membership to compete in a series and collect points.

Rulebook

All British Obstacle Sports competitions follow the Series and League rulebook. However, where different the rules on this page will prevail.

Adaptive Athlete Registration

The Limitless Challenge is open to adaptive athletes only. To enter, please complete our registration form.

In most cases, athletes will be classifiable within the FISO Adaptive Athlete Classification System (outlined below). However, if you do not fall into one of these classifications, you can still complete the registration form and your application will be reviewed by our team.

PO1:

Athletes in this class use a wheelchair and are able to self-propel in areas of flat or even terrain. This class includes athletes with, but not limited to impairments of muscle power, range of movement, limb deficiency such as unilateral or double leg amputation, spinal cord injuries resulting in paraplegia or tetraplegia.

PO2-1:

Athletes in this sport class have a significant limitation within the obstacle elements of racing. They have a severe degree of activity limitation such as, but not limited to: complete loss of range of motion, power or proprioception in one arm, through-the-shoulder amputation, severe cerebral palsy or a severe neurological impairment affecting mostly the upper body. Athletes in this group are unable to use their upper limb to grip under the armpit.

PO2-2:

Athletes in this sport class have a significant limitation with the running elements of racing. They have a severe degree of activity limitation such as; complete loss of motion, power or proprioception in one leg, short stature or a severe neurological impairment affecting mostly the lower body. Athletes in this class may choose to use mobility devices to race such as walking stick(s) or crutches.

PO3:

This sport class includes athletes with a moderate degree of activity limitation in their lower limb(s) such as athletes with, but not limited to; lower limb amputation, moderate neurological impairments affecting the lower body or a loss of range of motion or power in the ankle or knee joint.

PO4:

This sport class includes athletes with a moderate degree of activity limitation in their upper limb(s) such as athletes with, but not limited to; upper limb amputation where the athlete is able to grip under the armpit, moderate neurological impairments affecting the upper body or a loss of range of motion or power in the wrist or elbow joint.

PO5:

Athletes in this sport class have a visual impairment.

2026 Provisional Standings

*(last updated 4th October 2026)

2025 Final Standings