However you take it on, the trek will test your stamina. But don't worry - you'll be supported all the way, and the beautiful views, the fantastic camaraderie and finally getting over that finishing line to your medal, and a glass of bubbly will never match the amazing sense of achievement.
The challenges are brilliantly supported with hot food, snacks and drinks, rest stops, medics and masseurs. There's also a handy shuttle bus to local stations and halfway points.
The Full (100km) Challenge
Even for the longest of the Thames Path challenges there are choices to be made. Choose whether to do it as an individual or as part of a team. Choose whether to do Putney Bridge to Henley as a 24+ hr walk day and night (33 hr maximum) or the two day option: 50 km on Saturday and 50 km on Sunday. And you can choose the speed - you can run, walk or jog the route!
Registration fee: £80 (Save £10 until 25th Dec with code WINTERCF - pay only £70)
Fundraising Target: £425
The Half (50km) Challenge
Whether you do it as an individual or as part of a team, for the Half Challenge you get to choose between two different 50 km options. Plus you can choose the speed you tackle the challenge: you can run, walk or jog the route.
Registration fee: £60 (Save £5 until 25th Dec with code WINTERCF - pay only £55)
Fundraising Target: £275
The Quarter (25km) Challenge
With this challenge you choose which of the four 'quarter' options to walk. As with the other challenges you can also choose the speed - you can run, walk or jog the route.
Registration fee: £40
Fundraising Target: £175
So do you fancy getting down to some serious river business on England's most historic river path? Head on over to the Action Challenge website for more information and sign up. Don't forget to let us know too!