Is it skied or skiied?
The past tense of ski is skied, not skiied.
“Skied” (with one “i”) is the simple past tense and past participle form of the verb “ski” (e.g., “She skied at Vail last year,” “She has never skied at Park City”).
QuillBot’s Grammar Checker extension will pick up verb form errors such as “skiied” instead of “skied” in your texts.