What are some good hiking and running trails in Irvine? I like jogging and hiking but have mainly just run around my neighborhood. I been to Jeffrey Trail already and have checked out Letsgooutside.org but it seems like most of the hikes that they offer are mainly guided by someone and I would have to sign up before. I've also heard of Mountains to the Sea trail but don't know where the start of it is in Irvine. Thank you.