first ski of the season; first ski run
Refers to the first time skiing in a new season, often with a festive or fresh-start feeling.
I plan to go for my first ski of the season at the end of the year.
I fell on my first ski run of the season.
Standard kanji spelling.
Mixed kanji-kana spelling; less common but still seen.
Compound of 初 (first) and 滑り (sliding/skiing), literally 'first sliding'. A straightforward seasonal term.