There are hike and bike sites.
Here are a couple of links for you to check out (last one seems best): https://www.mtbproject.com/directory/8017681/lake-perris-state-recreation-area https://www.singletracks.com/bike-trails/horse-trails.html https://www.alltrails.com/trail/us/california/lake-perris-loop-trail
Not to my knowledge
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