Bike friendly fire roads in Los Angeles and surrounding areas
I was wondering if there's a definitive way to find out which fire roads/trails are open to bikes in Los Angeles and surrounding areas? I've noticed some fire roads and trails merely prohibit motor vehicles, but there's no mention of bicycles being prohibited. Some trails have signs that specifically prohibit bicycles at the trail head such as in Griffith Park. I don't ride crazy or anything, I just want to enjoy some trail riding at the appropriate places. I'm presuming that there would be specific signs that would prohibit bicycles if they weren't allowed. Thanks for any feedback or resources.