MORENO VALLEY, Calif. (KABC) -- By day, Box Springs Mountain Park is enjoyed by hikers. By night, residents like Amy Harris, say the wildlife preserve attracts a different crowd.
"They come and leave all their trash and their broken beer bottles, beer cans and it looks like a dump," Harris said.
The late-night partyers leave behind an ugly mess: drug containers, condom wrappers and clothing -- all strewn along the trails and park road.
While signs clearly state the park closes at dusk, those rules are simply ignored.
"It's such a nice area, you would think (they would) just leave it alone," hiker Melissa Doolen said.
The Moreno Valley Police Department says it responded to the area 45 times last year.
Residents want police to increase patrols and install a gate at the bottom of the road where the park starts. A year ago, they even asked Riverside County transportation officials to install a remote access gate at Gawn Trial Road and offered to pay for it.
"They're sort of pacifying us. They're listening, but we have seen no action," Moreno Valley resident Kristina Zaragoza said.
The Riverside County Transportation Department says a volunteer monitors the park 24 hours a day to alert law enforcement of illegal activity.
It also stated, "Placing a gate would block access to a public road and would pose a liability if emergency services teams could not respond quickly to a locked gate."
For now, residents have posted a sign in the hopes it will curb some of the late-night activities.
It reads: "Slow down. Turn music down. Keep your trash in your car. Keep your clothes on. Smile."
Box Springs Mountain Park trashed at night, residents outraged