Thames Meander Route Descriptions. The Thames Meander event is a stunning riverside race series starting in the Small Profit Dock Gardens (Barnes) which is adjacent to the Barnes Sports Club Race HQ, The Club House, 261 Lonsdale Rd, London SW13 9QL. The run-route starts within the park area at the Small Profit Dock Gardens and heads out across Barnes Bridge towards Kew Gardens along the Thames Path trail all the way to the Petersham & Ham Sea Scouts on this very scenic out and back route. All three race distances the marathon, half marathon and 10km are very fast, flat on a runnable route proceeding all along the Thames Path, and the course will be well marked and marshalled all the way along. The Check Points will be well stocked, and there will be professional medical support from our KLP Medical Supplies team. Runners World rated as one of the top 10 trail marathons in the U.K. Thames Meander Routes: These three run-routes will all start at the Small Profit Dock Gardens (Barnes) adjacent to the Barnes Sports Club Race HQ and will run alongside the Thames Path to the Petersham & Ham Sea Scouts turnaround point (Petersham) along these stunning out / back routes. 10km Route: This will be a x1 lap out / back loop for the 10km distance, starting at Small Profit Dock Gardens (Barnes) and heading out along the Thames Path to Kew Gardens Car Park Check Point 2 the turnaround point on this out and back run-route. Half Marathon Route: This will be a x1 13.1 mile out and back loop for the half marathon, starting at the Small Profit Dock Gardens (Barnes) heading out along the Thames Path to Petersham & Ham Sea Scouts CP3, the turnaround point on this out and back run-route. Marathon Route: This will be x2 13.1 mile out and back loops for the marathon, starting at the Small Profit Dock Gardens (Barnes) heading out along the Thames Path to Petersham & Ham Sea Scouts CP3, the turnaround point on this out and back run-route.