Griffith Observatory is perhaps one of the most beloved hikes in LA, a place where you might even cross paths with a celebrity who is getting their steps in for the day. One of the more typical hikes starts on the 2-mile trailhead of the Greek Theatre. Expect the best views of the city, and if you go further, you can even stand above (and behind) the iconic Hollywood sign. The best way to ensure you stay on the right path is to go on guided hikes with in-the-know locals.