By Layla Valinoti July 22, 2025 Newsflash: backyard birthday parties aren’t just for little kids. Teens love being outside with their friends, too, especially when you’ve gone all out planning a party that’s fun, age-appropriate, and totally out-of-the-box. Don’t have much space? Never fear. Even the smallest backyards can host some amazing parties. And whether you want a relaxed hangout or some energetic games, we’ve rounded up the best outdoor birthday party ideas for teens to excite them.