The Water! Walk with Viva con Agua started from Kigali on November 6 with 30 runners from Rwanda, the East African Community and Europe.
The walk is funded by the German Foreign Office in an exceptional joint initiative of Viva con Agua Germany and Viva con Agua Uganda.
Participants will walk 550 kilometres on foot within four weeks, raising awareness on the importance of clean drinking water and the adverse effects of climate change.
They also raise awareness through exchanges with local students and music, sports and arts events.
The German ambassador to Rwanda, Peter Woeste, met with them shortly before their departure.
The starting point for awareness was at a music and arts festival at Inema Arts Gallery on November 4 in Kigali.
Viva con Agua also runs a sponsoring campaign for two water projects, including one in the Nyagatare District in Rwanda.
The timing of the walk concides with the 23rd UN Climate Change Conference (COP23) in Bonn from November 6 to 17.