In Algonquin Park, my uncle discovered roads open to the public that penetrate the park for access to the innermost [camping locations](http://www.algonquinpark.on.ca/visit/camping/drive-to-camping-in-algonquin-park.php) and  access points (ie: Achray Road, which originates from Barron Canyon Road, and then passes [Achray](http://www.algonquinpark.on.ca/visit/camping/birchcliffe-ranger-cabin.php), Algonquin Observatory and then Lake Traverse). Such inner roads befitted, benefitted, and satisfied my grandparents [who cannot hike](http://travel.stackexchange.com/q/55493/13759).

Except Algonquin, which other provincial parks in Ontario (please include the non-operating ones) contain such inner roads?