In the wildest day of action so far in the National Park Playoff, two matchups came down to the wire, with one tie broken in the final minutes. #10 Everglades and #15 Virgin Islands each went on runs against the other in a pairing frequently featuring ties and lead changes. In the final two hours, the score was knotted at 17 apiece before the decisive point was scored just before the buzzer sounded on an 18-17 win for the Florida landmark. While this game wasn’t an upset itself, it did vault the first double-digit seed into the Sweet Sixteen, where it will be joined by two upset winners from Day Ten. In the Southwest, #7 Saguaro continued its Tucson-fueled run with a 74-35 comeback win over #2 Rocky Mountain. And in the Pacific, #7 Hawaii Volcanoes jumped out to a substantial early lead and barely survived a furious comeback by #2 Olympic, winning 19-17. The lone two-seed to survive to the Sweet Sixteen was #2 Grand Teton, who handily beat #10 Devils Tower 21-10. This leaves the East’s #3 Statue of Liberty, who faces #11 Mammoth Cave today, as the lone surviving monument in the tournament. Day Ten’s winners will face today’s winners on Tuesday, May 19.

Commensurate with the surprises, predictive brackets got wrecked on Day Ten, notching their first ever minority score with a 42% accuracy rate. Doubting the power of the Tucson lobby, 15 people chose Rocky Mountain to advance, while one more chose the previously eliminated Guadalupe Mountains. In the Pacific, eight predictors advanced Olympic and two more put forth the eliminated Crater Lake. In the East, five prognosticators chose Virgin Islands and seven more the monument it knocked out in the first round, Lincoln Memorial, while a thirteenth person chose Indiana Dunes. The North was the most predictable quadrant in this bloodbath, with four people picking Devils Tower and one Isle Royale. Of the 19 brackets, just one was perfect on this day and one missed all four picks.

With half of the Sweet Sixteen cemented, four more parks will be anointed in today’s Twitter voting… spread the word!