a New Calero Parking lot is connected here directly across McKean from Fortini. It also connects to the North ridge trail which currently doesn't have any connection which breaks routing I've noticed. Not very good detail but it's on the park map.

https://www.sccgov.org/sites/parks/parkfinder/Documents/CaleroGuideMap.pdf

Some newer versions of google earth show the parking lot.

If it helps I also uploaded a GPS trace which shows me biking through the parking lot and onto the north ridge trail.