Someone just made a TTC style map of trails in Toronto's Don Valley Stay in the loop Sign up for our free email newsletter. Unsubscribe anytime or contact us for details. The Don Valley is one of Toronto's greatest treasures, and there's no better time to explore the routes that run across the 12,000-year-old Don River. If you plan on hitting up Crothers Woods or the East Don, but your map-reading game is a little rusty, don't panic. A former Toronto resident has drawn up a guide to the Don modelled after a map you're probably familiar with: the TTC.