The weather was mild when we originally decided to tackle Mt. Diablo, but a few days beforehand a heat wave pulled in so the high was 88-95 depending on what data we used. It. Was. Hot. And dry. And exhausting.

This was our 4th peak and by far the most challenging. We used the guidance linked in SocialHikers and had to backtrack at first (the paved fire road was a very brief part of the start and we should have veered left almost immediately). The ascent was a ridge line path, exposed to the elements single track and occasional gravel or large boulders that made for slow going. The three peaks on that climb made it incredibly challenging – eagle peak, twin peaks, and then finally to the summit. This was truly a strenuous hike and not for the unconditioned. we had extra water, snacks, and electrolytes and we needed them all. Water was tapped out by the top. Luckily they have a refill station (tastes like hose water, be warned!) and a small gift shop with drinks if you’re so inclined (although I hear that’s only on weekends).

we were excited to get to the summit, but totally exhausted by then—and still had to go down. We were nervous because this was a loop that the trail down would be just as bad, but were relieved to see paved fire road the whole way back. It makes one wonder whether the hike is more manageable as an up and back using the fire road (deer flat) through Mitchell canyon versus the meridian ridge path??

we survived and round trip was about 8 hours. We agreed the exertion was similar to running a half marathon. The shins, knees, and calves were sore at the end because steep downhill is not very fun either!

Ultimately this was a huge accomplishment and we are looking forward to two last peaks that aren’t quite as strenuous—and of course in all likelihood with cooler weather as Fall approaches.