1.
excursion, school trip, field trip
A trip taken by a group, especially a school outing to a nearby destination.
2.
hike, picnic
A recreational outdoor trip, often involving walking.
Usage: 遠足 typically refers to school excursions for elementary and middle school students, but can also mean hiking trips.
Common patterns
School context: Japanese schools often organize 遠足 in spring and autumn to parks, zoos, or historical sites.
Cultural note: 遠足 evokes childhood memories and is associated with お弁当 (packed lunch) and おやつ (snacks) that children bring.