In 2022 there is no parking. You have two choices, reserve shuttle from Breckenridge in advance or reserve Parking in advance at Quandary lot which includes shuttle to the McCullough drop off. It's an extra mile to the trailhead. The trail is rocky, steep and very scenic. July the waterfall was fabulous and the wildflowers. We made it to the lower lake . 4 hours including lunch at the lake.