(Portland, OR) -- Visiting Multnomah Fall will require a parking permit starting Friday. The permits are allocated by time to limit the number of vehicles in the parking lot. You buy permits at recreation dot gov, there's a two-dollar transaction fee and you can buy a permit up to two weeks in advance. Some permits will be available for same day pickup without a fee at the Gateway to the Gorge Visitor Center in Troutdale and the Cascade Locks Historical Museum. The permits are required through Labor Day.