The battles get harder and the votes get even more important now that we're in the Sweet 16! The ballot below will be live through midnight ET on April 6, so even if you missed earlier rounds, add your voice to see who gets into the Elite 8. All entries are eligible for a raffle of prizes – details at the bottom of the page. Follow @theparkschannel for stories and reels, and use #parksmadness to share photos and let us know what you think!

Headline Matchups for This Round

As the Sweet 16 of Parks Madness opens today, there are several marquee matchups to look out for:

Yellowstone bracket – No. 1 Yellowstone faces off against its next-door neighbor, No. 5 Grand Teton, while No. 3 Glacier bumps up against upstart No. 7 Redwood.

Yosemite bracket – Two immovable objects clash with No 3 Grand Canyon taking on No. 2 Mount Rainier, while No. 1 Yosemite confronts California cousin No. 4 Sequoia.

Acadia bracket – To-the-bone Badlands at No. 5 has an uphill battle against No. 1 Acadia, and No. 3 Arches tries to ascend past No. 2 Rocky Mountain.

Zion bracket – Eastern oases Shenandoah and Great Smoky face off while No. 1 Zion grapples with No. 5 Mesa Verde.

All entries eligible for a raffle of prizes from our partners.

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Featured photo by rorozoa – Freepik; Parks Madness logo by Drake Poe; badges by Anderson Design Group; Parks Madness brackets by Darius Nabors.