At least 200 runners will try and take Chris Estwanik and Deon Breary’s crown when they take to the start line of the Renaissance Re ten mile challenge tomorrow.Also scheduled is a five-miler.The two road races, along with a team challenge that was won last year by the sponsors, begins at 8.30am from the Lagoon property opposite the Botanical Gardens on South Shore.Estwanik, who finished second last week in his maiden full marathon in Virginia Beach, Virginia, made it a hat-trick of wins at the event last year, although organisers didn’t know yesterday whether he will compete tomorrow as he recovers from the 26.2 race.But Breary will be defending her title.The event is one of Bermuda’s longest-running road races, having started in 1980 and as continued with different sponsors over the years.The five-miler was added last year as well as the team event.Just six teams had registered by yesterday; PricewaterhouseCoopers, JLT Park, Conyers Dill and Pearman, RenRe, ACE and XL Capital.Number pick-up and late registration will take place at RenRe offices today from 10am-12pm.The 10 mile course takes runners taking out to Mid Ocean Club on South Shore and back again. Those in the five mile race turn around at Spittal Pond.Former Bermuda ten mile record holder David Saul will present the trophy to the winning local male.