Two runners are gearing up for a gruelling six-day run across the Sahara and they start their training with Barnstaple Marathon on Sunday.Alison Little, from Braunton, and Wendy Dale, from West Down, will be taking on the Marathon Des Sables in Morocco in April 2017. The challenge will see the keen runners who have completed more than 100 marathons between them carry heavy backpacks, endure soaring temperatures and survive on rations of water. Alison said: Ive always talked about it and wanted to do it, and as I turn 50 next year it seemed the right time. As part of their training the pair will be taking on several multi-day marathons in the run-up to April. The pair are also members of local clubs - Wendy runs with North Devon Road Runners and Alison with Chatty Paces. Wendy and Alison are raising money for North Devon Hospice (NDH) and Childrens Hospice South West (CHSW).To sponsor them, visit www.justgiving.com/wendy-dale2 to donate to CHSW or www.justgiving.com/fundraising/Alison-Little7 for NDH.