With the Waterfront Trail skirting the north shore of Lake Ontario, you have an opportunity to capture vistas from high above the lake or sink your feet into the lake's sandy beaches. Cycle to Port Hope on the Pickering to Port Hope section. The towns and villages of Cobourg, Grafton, Colborne, Brighton allow for shopping, dining or picnicking at the lakefront. The Cobourg to Quinte West section takes you to farm fresh destinations and by the gates of the very popular Presqu'ile Provincial Park.
The Waterfront Trail is a few blocks south of Cobourg's VIA Rail Station (Bike Train). After you disembark the train, the baggage handler will personally hand you your bike from the baggage car. Head south down George Street where you'll see Lake Ontario, the Cobourg Marina and the start of your journey on the Waterfront Trail east or westbound.
Consider taking the GO Train eastbound from Toronto (leaves every 30 mins) with your bike on board at non-rush hours. Disembark at the end of the line which is Oshawa and head 1 km east on Bloor Street, south on Park Road South to connect with the Waterfront Trail on Stone Street (6kms in total GO Station to Waterfront Trail). Reference the Pickering to Port Hope link above.