escape the heat?

hi guys I recently moved up here with my 4month old so I’m not too familiar with this area/ surrounding areas. I live in San Bernardino. I’m wondering if anyone can recommend me some trails/ parks/ areas to escape the heat and keep cool so I don’t just keep myself and my baby in the house all summer! I’m most comfortable driving 30 mins out (45max) just cause I’m not used to going out so far with her on my own, but any suggestions are appreciated. thanks in advance!!

also looking for some young mama friends too if anyone is interested 🥹🙏🤎