June 6, 2026 / Mammoth Lakes, CA / by Dad
Season one by the numbers: zero to 540 in 157 days at Mammoth
When parents ask what it took for Seby to go from his very first turns to his first 540 in one season, they usually expect a secret. There isn't one. There's just a number: 157 days at Mammoth (163 on snow for the full season) — and a kid who wanted to be out there for every one of them.
His first day on a snowboard ever was November 23, 2024. Here's the honest season-one log. Nothing rounded up, nothing padded:
| Where / what | Days | Notes |
|---|---|---|
| Mammoth Mountain (snow) | 157 | Mid-November through mid-May |
| Mt Hood (snow) | 6 | Summer laps |
| Mt Hood (airbag) | 7 | First bag sessions |
| Japan (airbag) | 11 | 720s landed, plus one 900 — on the bag |
| Backyard jib (homemade) | 26 | I built it. It shows. It still helped. |
| Trampoline | ~4 days/week | About an hour a day, for months |
A few notes on what the table doesn't show:
The trampoline mattered more than it looks. An hour a day, four days a week, all through the winter. Air awareness — knowing where your body is mid-spin — isn't really learnable on snow at this stage, because you don't get enough airtime per day. The tramp is where that got built.
The Snowboard Addiction jib setup earned its keep. His first 270 off a rail traced directly back to reps on that thing in the yard. The homemade backyard jib? Let's say it contributed... atmosphere. (It helped a little. It was very homemade.)
No contests in season one. Nationals came later — he rode Copper Mountain in season two, which is getting its own write-up.
The progression order, for the curious: linked turns → 180s → 50-50s on tubes → first 360 (taken to a real jump at Forest Trail) → rails and boxes, first 270 off → first 540 in spring. Then the summer bridge: Hood, and the Japan airbag trip where the 720s and the one 900 happened.
If you're a parent doing this math for your own kid: the days matter more than the gear, the camps, or anything else we spent money on. Time on snow is the whole game. (Season two's log — 169 days and counting — is coming when the season actually ends in November.)