Atkinson will cover 45-miles
Manx riders are taking on a mountain bike marathon in the UK today.
Emma Atkinson is one of those competing in the 45-mile event being held in Sussex.
She expects to be riding for around five or six hours.
Emma says challenges like this depend on her having the right support:
Harrison: 'Support will fuel my comeback'
Manx rider hopes to be home next week
Multiple titles up for grabs in ARA Championship finale
Final round of season taking place at Jurby today
Higgins hat-trick hands Ravens vital win
FC Isle of Man beat ten-man Charnock Richard to end losing streak
More than 250 sign on for today's End To End Walk
Bus timetable changes and traffic restrictions in place during event