Los Angeles may be best known for Hollywood, but the real star of Southern California are the hiking trails.
In Griffith Park, alone, is a network of trails 53 miles long all within city limits – a feat few American cities can match. But then there are also trails to find along mountainsides, overlooking the beach, snaking through the desert and more.
Hiking is actually a key piece of L.A.'s history.
"At one point, it was the reason that people came to L.A." says Schreiner.
Called the Great Hiking Era, it spanned between the late 1800s through the early 1900s.
People from all over the world traveled to Southern California to stay at wilderness resorts like Sturtevant Camp in Santa Anita Canyon, which still exists today.
They could trek through the landscape on trails created over centuries by a combination of Native American tribes and migrating wild animals.
It's surprising to some who only think of L.A. as a dense city with a history of glitz and grime.
"Hiking is not necessarily broadcast as a selling point of the city of Los Angeles," says Schreiner. But it is a way of life, here (and a great way to see celebrities at places like Runyon Canyon!).
It's also very accessible to all levels of hikers compared to other regions.
"People who move here from parts of the country that have a very strong hiking tradition, like the Pacific Northwest, don't see anything that looks what they're used to hiking," he says. "What's great about L.A. is that the hiking here is open to casual, beginning hikers."
So, no, $6,000 worth of gear isn't required. In many cases, sneakers and gym shorts will do.
And he believes that L.A. is on the verge of another great hiking era.
"The people who are hiking here are very diverse and extremely varied," says Schreiner, "and people in L.A. are finally waking up to the idea that L.A. is an amazing outdoor city."
Casey's recommendations for hikes in Los Angeles
The trails are 4 to 5 miles, each, and are rated easy to moderate.
"You don't want to go there during the summer because it gets totally baked and fried by the sun," he says, "but during the winter and spring, it has some of the best views in the whole of L.A. County."
For intermediate hikers
This is a 6-mile trail that loops around the tallest mountain in the range, and it's good anytime of the year.
"This is my favorite hike in the L.A. region.," he says.
You'll be able to see everything great about Southern California's landscape: rock formations for climbers, Channel Islands in the Pacific, oaky woodlands and more.
For expert hikers
"It's sort of known as one of the toughest, most remote hikes in the San Gabriels," he says.
Half of it is off-trail, and the elevation gain can be brutal.
"That is a leg-buster that will have you walking funny at the office the next day," says Schreiner.