"the others" usually means all those in a designated group apart from some already mentioned. "others" is less specific. "They went for a walk to the mountain and others on the field" doesn't make sense to me with either "others" or "the others".
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousThey went for a walk to the mountain and others on the field.This sentence makes no sense. What did "others" do?
AnonymousWe are playing soccer and the others are watching.This one is possible with or without the article.