Take on the Thames Path Challenge following England's greatest river - most will be walking, many will jog, some will be running, and all will have a special reason to push themselves.
The full 100km route heads upstream from Putney Bridge, past Hampton Court to Runnymede of Magna Carta fame at 50km, then on past wonderful scenery all the way to Henley.
There's also the 'Thames Bridges Trek' - 25km through Central London zig-zagging over 16 of London's historic bridges - with the best views of the Capital's landmarks.
50km and 25km routes also available at lower deposit and fundraising cost.
Please click here to sign up for this fantastic challenge.
Volunteering with Teens Unite has changed my personality and outlook on life. When I hear all the amazing things the teens say about Teens Unite, I can tell they mean every word.Nathan, 23, Volunteer
Teens Unite isn't just a charity to me, it was the beginning of restarting my life.Jess, 22, Teen, Acute Myeloid Leukaemia
When Elliot started receiving the support of Teens Unite, I could see a change in him straightaway. His outlook on life was becoming positive again and I gained strength from seeing my little boy accepting what had happened and starting to move forward.David, Parent to Elliot, 18, Non-Hodgkins Lymphoma
I needed help and that's where Teens Unite came in. I believe that everything happens for a reason, and the reason I met Teens Unite was to save my life.Harry, 20, Teen, Testicular Cancer
With Teens Unite, I finally realised that I could climb out of this massive hole that I had been digging because I wasn't alone anymore.Leanne, 21, Teen, Acute Lymphoblastic Leukaemia
If it wasn't for Teens Unite, I wouldn't be where I am now. They have been really supportive and given me the strength to push myself and not give up.Derry, 20, Teen, Brain Tumour
My wife inspired me to volunteer following her fight against cancer. I wanted to help others carry on living their lives the way she did. And that's exactly what Teens Unite does.John, 64, Volunteer