Smile 90.4FM Celebrates A Decade Of The Slave Route Challenge, Powered By Brimstone.: Cape Town’s most iconic road race, The Slave Route Challenge, sees its 10th year in 2020! The slave Route Challenge, powered by Brimstone, is one of the most unique races that celebrates Cape Town Heritage and historical significance. Smile 90.4FM is proud to be the official media partner for … [Read more...] about Smile 90.4FM Celebrates A Decade Of The Slave Route Challenge, Powered By Brimstone.