The Michael Sobell Hospice, based at Mount Vernon Hospital, is holding the On Your Bike event tomorrow.
The sponsored 35-mile bike ride will take cyclists through the scenic country lanes of Amersham, Bovingdon, and Hemel Hempstead.
There will be also be a water and comfort stop at The Boot Tavern, in Chipperfield. Last year more than 100 cyclists took part and the hospice hopes to double that total this year.
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