School is in session at Windells Academy, the only high school in the US where you can ride real snow on a mountain in September.

Gavin, Devin and the skate crew take the most epic field road trip in the history of the world hitting up San Francisco's sickest skate spots and scoring VIP passes to the final stop of the Dew Tour. Devin loses his temper, the guys ride a full pipe and a pool hopping goes very, very wrong. Meanwhile, back on campus, Autumn faces one of her biggest fears: jumps.

Windells Academy partners with Truth to host the Battle Out Back, its first ever winter skate contest - but the kids aren't that stoked on competing.

Sierra surprises Zach when she picks him up at the airport. Sierra and Autumn hit the gym and strategize about landing sponsors.

The Windells mountain crew piles in the vans and heads east for their annual winter field trip.

Zach gets an early case of senioritis during his final days at Windells. He lets Sean cut him a wicked mullet. The end of the semester marks the beginning of contest season for the snowboarders. Sierra feels pressure to perform, impress her sponsors and pave her way to nationals. She pushes herself hard and takes a dangerous fall in the rail jam. Fearing a concussion, Coach Andy benches Sierra.