LONDON  - Mariana Pajon of Colombia won gold in the women's BMX final after finishing ahead of New Zealand's Sarah Walker and Dutchwoman Laura Smulders on Friday. Walker took the silver medal with Smulders winning the bronze. Pajon, who started from gate four, burst down the start ramp and took the lead from the outset on the 440m women's circuit and was never in danger of being overtaken. British gold medal hope Shanaze Reade lost ground midway through the race and eventually finished sixth, one place behind Australia's Caroline Buchanan.