The compound noun "day hike" is used to describe "a hike that can be completed in a single day". It is most frequently written with a space in between the words, though you can find examples online where people have spelled it "dayhike" or "day-hike". Google automatically corrects searches for the word "dayhike" with "day hike".
Since "hike" is both a noun and a verb, "day hike" is commonly verbed, e.g. "Or you can choose to day hike into the canyon."
Is that usage correct? Here's the sentence that triggered this question:
To day hike any farther, I'm going to need longer days...
Should "day hike" be hyphenated in this case? Is there a general principle to follow in cases like these?