What kind of biking are you looking for. The Georgian trail is hard packed on an old rail line. Runs from Meaford to Collingwood. A good base would be Craigleith Provincial park, right on Georgian Bay and the trail.
Meaford has a good municipal serviced park on Georgian Bay with a sand beach.
There is mountian biking down Blue Mountian ski hill in the summer if you are that brave.
2019 Springdale 240BH
2009 F150 Scab 4x4, 4.6, 3v. 6spd. 3.73/9.75
Reese dual cam