NICE! You know the area well! I live in Brea, myself about 2 miles from the trailhead. This was my very first shakedown ride on the Creo, so I only went up to Four Corners from Carbon Canyon Regional Park. I learned the dropper post was useful, but I need to adjust the reach on the GRX levers. They were too hard to pull un when I was in the drops. Next time, I'll be riding up Telegraph from Carbon Canyon to Chino Hills, then up Bovinian to SouthRidge, and Southridge back to Carbon Canyon. After that, I might venture up Faultline and Raptor Ridge and the rest of the park as well.