home made fundraising event ideas

A few weeks ago a work colleague sadly passed away with cancer and a few of us at work would like to raise some sponsorship and money for his widow for charity or a memorial or bench or whatever, we just want to do something.

We are wanting to arrange something ourselves rather than enter an event. We are also wanting to do something that will challenge us physically and mentally.

The other two want to do a middle distance triathlon (2.5k swim/80k bike/20k run) my current prefered choice would be the C2C over a weekend rather than 1 day event.

What else could we do? Any ideas out there? Doesnt have to be bike related.

I have seen on the Sustrans site, there is a long route from Derby to Holmfirth via buxton on sustrans paths. IT’s 80 miles.

How long do people think that could be done in? not racing it but going at a decent pace in order not to be out forever. is 10 mph a good pace, average? including breaks etc. eg riding 50-55 mins having quick breather and then riding for another 50mins and so on.

anyone got any other suggestions?