CTR Diablo Trail Run
Clayton, CA
- 50K, Marathon, Half Marathon, 10 Miler, 4 Miler, Kids Run
- Trail (Unpaved)
- Official race website
Mount Diablo provides spectacular views of the San Francisco Bay Area and surrounding valleys. The 4 mile course is relatively flat and fast within Mitchell Canyon. The longer CTR Diablo Trail Run events are mountainous and very scenic. Fully-stocked aid stations every 3-5 miles. You can expect fresh fruit, salty … MORE
Local Historical Weather (Sep 06):
| 2025 | 2024 | 2023 | 2022 | 2021 | |
| H (°F) | 77 | 96 | 81 | 111 | 100 |
| L (°F) | 62 | 61 | 59 | 74 | 58 |
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Fun run!
Very well-organized and friendly - the 4 mile was flat/uphill on the way out and flat/downhill on the way back which I loved, get the hard stuff out of the … MORE
Very well-organized and friendly – the 4 mile was flat/uphill on the way out and flat/downhill on the way back which I loved, get the hard stuff out of the way and enjoy the fast finish!
Well organized
The course was very well marked. Much better than some other trail runs I've done. I will definitely look into doing more runs by coastal trail runs. The course was … MORE
The course was very well marked. Much better than some other trail runs I’ve done. I will definitely look into doing more runs by coastal trail runs. The course was good width. I did the four miles and the course length was very accurate. The 4 miler is a back and forth so it’s a mirror as far as uphill and down hill. It’s two miles uphill and then two miles down hill. The turn around reminded me of the superman ride at magic mountain. Nice post race area wit snacks.
What goes up...
I ran this more as a "fun run" with friends than an all-out race. I knew it was a steady climb up for the first 5 miles (2400' total), then … MORE
I ran this more as a “fun run” with friends than an all-out race. I knew it was a steady climb up for the first 5 miles (2400′ total), then back down the same route for the second half, so I paced myself. I mostly hiked on the ascent, as the climbs were relentless. About half a mile from the top, we reached some gorgeous views and my friend and I took a short break to take photos of each other — something I never do during a “real” race. We caught up with another friend and the 3 of us ran down together. It was really fun! I’d definitely run this race again. Also, despite my leisurely pace and a long potty break, I still came in 3rd in my age group. Gotta love these small trail races!