Oregon State Park annual day-use passes are on sale during the month of April. Normally they cost $25, but for this month only, they cost $20. The Parks Department calls it their “annual springtime stimulus” deal.
You can’t buy them online, but you can buy them over the phone by calling (800) 551-6949 (credit card orders only). They’re also available at state parks or through private vendors. Oregon has hundreds of state parks and about two dozen of them require an entrance fee.
If you’re camping at a state park, the charge for camping already includes the entrance fee.
Here are some links to more information:

