Cycling Outside Waterloo Region

[jamincan]

I think you're probably thinking of the Caledon Trailway. A friend and I actually rode from Kitchener to Orillia almost entirely on rail trail using the Elora-Cataract Trail, the Caledon Trailway, and the Oro-Medonte Rail Trail.

The amazing thing is that you could actually bike from Goderich to Midland using rail trail almost the whole way except for a few small gaps.
https://ridewithgps.com/routes/28203736