Link:

 

I bought a day use park pass for 2021, and after I bought I found out that:
On March 24, Ontario announced that Ontario Parks will be offering free weekday day use visits Monday to Thursday from May 1 to September 2, 2021. This will make it easier for Ontarians to enjoy the province’s beautiful green spaces and other recreational activities that our provincial parks offer, as well as support local communities and businesses that have been impacted by the pandemic.

We know that you have already purchased your Seasonal Vehicle Permit for this year. To help you get the most value out of your permit and take advantage of the free day use in 2021, Ontario Parks is extending the expiry date of the 2021 Annual Daily Vehicle Permit for one year to December 31, 2022 and providing 2021 Summer Daily Vehicle Permit holders an additional season to use their permit. The summer daily vehicle permit will now be valid April 1 to Nov 30, 2021 and April 1 to Nov 30, 2022.

Note that you will still require a permit to visit parks on Fridays and on weekends. Just like daily vehicle permits, accessing a park with a seasonal permit is subject to park capacity limits.
It’s $75 for the pass, $6 for shipping and $10.53 for HST.

 

Link: