Overall Rating
Overall Rating (41 Reviews)
4.9
(41 Ratings)(41 Reviews)
DIFFICULTY
4.4
SCENERY
4.8
PRODUCTION
4.9
SWAG
4.6
For over 40 years, Save Mount Diablo has worked tirelessly to preserve and increase the open space on and around Mount Diablo. In that time, their efforts have taken us from 6,788 acres of open space to over 100,000 acres of open space on and around the mountain! With distances suitable for … MORE
Local Weather (Apr 11)
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H (°F) 61 59 63 63 70
L (°F) 51 46 52 53 48
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Recent reviews

    Profile photo of Barbara Rausch
    noneleft REPEAT RUNNER '19

    This event takes place at Castle Rock State park at Mt Diablo in Walnut Creek. There are four races that take place. There is a 50k that has 8000 Ft … MORE

    This event takes place at Castle Rock State park at Mt Diablo in Walnut Creek. There are four races that take place. There is a 50k that has 8000 Ft of elevation, a half marathon with about 2500 ft, a 10k with 1200 ft and a 5k with about 300 ft. I chose the 5k. Previously, I have run the half marathon in 2016 and the 5k twice.
    The 5k course is an out and back with an aid station that you see twice. Because of all the rain that we’ve had this season, we did have 12 stream crossings. Most were ankle deep, but there were a couple that went up to my calves and the streams were wide. There was no way to avoid them, so we all ended up with wet feet. This course is slightly technical because of the streams and the slick rocks and a couple of sections of sandstone that is slick and rutty. I do enjoy this course. Castle Rock Park is quite nice the scenery and all the trails.
    Brazen Racing produces great races. All finishers get a very nice medal and shirts. There is plenty of food at the finish including an It’s it Ice Cream Sandwich.
    In November, Brazen puts on the Summit Stomp which has a 30k in addition to the half, 10k, and 5k.

    DIFFICULTY
    3
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    4

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    mikebeckwith REPEAT RUNNER '19

    This is the toughest race I do all year. I've done 50 milers that are easier. :) But I tell you, there is nothing like finishing the Diablo 50k. This … MORE

    This is the toughest race I do all year. I’ve done 50 milers that are easier. 🙂 But I tell you, there is nothing like finishing the Diablo 50k. This was my fifth year doing it and my fastest ever! Weather was perfect.
    This race has a very generous cut off time (11 hours), and the best support group ever. Every time I’ve ran this race I am so impressed with how many people stay until the last 50k finisher comes in, just to cheer them on. I always stay, and to see the look on the faces of some people (who perhaps didn’t have anyone there to cheer for them specifically) is priceless. To see their smile when dozens of people are cheering loudly for them, is one of my favorite parts of this race (and the Brazen community).
    So if you want to run up to the summit, then up to North Peak, then all around the park, come out and do what I think is the best 50k around!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    law1422 REPEAT RUNNER '19

    This was my second time taking on the 50k at Mt Diablo with Save Mt Diablo and Brazen Racing. It was well organized, great aid stations, awesome volunteers and the … MORE

    This was my second time taking on the 50k at Mt Diablo with Save Mt Diablo and Brazen Racing. It was well organized, great aid stations, awesome volunteers and the medal is spectacular!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    law1422 REPEAT RUNNER '14

    My first 50k! It was tough but well worth the event. Well organized! Great aid stations! Beautiful course! Explore the mountain it is awesome! MORE

    My first 50k! It was tough but well worth the event.
    Well organized! Great aid stations!
    Beautiful course!
    Explore the mountain it is awesome!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    Fragileflower12 REPEAT RUNNER '19

    Expertly Run. Great AS support. Beautiful scenery. 2500 elevation. 22+ creek crossings. Well marked for the most part. What goes up, MUST come down. Miles 8-10 downhill after 4 miles … MORE

    Expertly Run. Great AS support. Beautiful scenery. 2500 elevation. 22+ creek crossings. Well marked for the most part. What goes up, MUST come down. Miles 8-10 downhill after 4 miles up. Should do it once!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    Profile photo of else von Schopp
    else REPEAT RUNNER '18

    Most of you already know and appreciate BRAZEN RAZING! You may also know that MT. DIABLO is one of the most beautiful places on earth. A perfect place to race … MORE

    Most of you already know and appreciate BRAZEN RAZING!
    You may also know that MT. DIABLO is one of the most beautiful places on earth. A perfect place to race when you tire of the usual-it’s unlike any other place at all.

    DIFFICULTY
    4
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    hmc24 FIRST-TIMER '18

    Nice group of people both putting it on and running. Parking down the street was easy- there was a shuttle bus from the high school to the starting area. Don't … MORE

    Nice group of people both putting it on and running. Parking down the street was easy- there was a shuttle bus from the high school to the starting area. Don’t be me and not train on enough hills prior to running this. I ran in the area weekly, but choose flatter trails! Oops! There are quite a few steep uphill sections and a sustained steep downhill section just prior to the last few miles which I was not prepared for. The other surprise for me was how many creeks there were to run though and how cold they were. Only a few single track sections where if you wanted to run up the hill you couldn’t as there was a line of people walking up. I suppose if you were speedy out the gate you’d be with other folks running up it though. Course was clearly marked. I thought the race guide said there was a bathroom at the half way aide station, but there was not. I held it, but it would have been nice to have some sort of bathroom at least once on course, as it’s pretty exposed so hard to just go ‘in the woods’. Cute shirt and medal. I guess there was some food at the end, but my kids were sick of waiting for me since it took me a long time and we left pretty quickly.

    DIFFICULTY
    5
    PRODUCTION
    4
    SCENERY
    5
    SWAG
    3

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    Scottlee FIRST-TIMER '17

    Aid stations are spaced out in great locations and there is a new view around every turn. Trails are mark and easy to follow, but they are very challenging from … MORE

    Aid stations are spaced out in great locations and there is a new view around every turn. Trails are mark and easy to follow, but they are very challenging from start to finish. This is a must do at least one time, and I will do a repeat next time in the area.

    DIFFICULTY
    3
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    4

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    Profile photo of Barbara Rausch
    noneleft REPEAT RUNNER '18

    Second time running the 5k, but I volunteered the two years prior to the 5ks. All races start and end at Castle Rock Park in Walnut Creek at the base … MORE

    Second time running the 5k, but I volunteered the two years prior to the 5ks. All races start and end at Castle Rock Park in Walnut Creek at the base of beautiful Mount Diablo. The 5k had ten (10) water crossings. These were not water crossings that you could jump over. These were stream crossing that you had to go through. Most were ankle to shin high. The water was COLD, too. The 5k measured 3.12 miles with 558 ft of elevation. There were some technical parts of the course, but the water was the most challenging aspect.
    The 5k had one aid station that we saw twice. The 5k turnaround was just past the aid station and another stream crossing. Eager volunteers were there to hand out water and sports drink. I did not stop, but Brazen AS are stocked with sweet and salty snacks, Gu, and fruit.
    All runners get a race shirt. 5k/10k get cotton and half marathoners get a technical fabric tee. The 50k runners get a special 50k shirt.
    Brazen Racing medals are first rate and this one did not disappoint. As you crossed the finish line, Sam, the race director, called out your name. This is always special after a tough race.
    There was food and drink at the finish as well as the traditional It’s It ice cream sandwich.
    A special note about this race from the Brazen Racing website:
    For over 40 years, Save Mount Diablo has worked tirelessly to preserve and increase the open space on and around Mount Diablo. In that time, their efforts have taken us from 6,788 acres of open space to over 100,000 acres of open space on and around the mountain!

    With distances suitable for everyone from those hitting the trails for the first time to experienced ultra-runners, the Diablo Trails Challenge was created to help celebrate and support these achievements. A portion of all entry fees will go to Save Mount Diablo to help them continue preserving open space and trails for all of us to enjoy.

    DIFFICULTY
    3
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    WindyRuns FIRST-TIMER '18

    This was my first trail race. I placed first in my age group and immediately signed up for a 37K and 100K - that's how inspiring this event was. There … MORE

    This was my first trail race. I placed first in my age group and immediately signed up for a 37K and 100K – that’s how inspiring this event was. There was such a great group of runners! And they went all out feeding the runners after the race.

    #BeBrazen

    DIFFICULTY
    2
    PRODUCTION
    5
    SCENERY
    4
    SWAG
    3

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    Jennynoel314 FIRST-TIMER '18

    Want beautiful scenery? Check. Want a butt kicking challenge? Check. Want both, combined with support from an amazing racing organization? You got it. This race rocks, but be prepared. It’s … MORE

    Want beautiful scenery? Check. Want a butt kicking challenge? Check. Want both, combined with support from an amazing racing organization? You got it. This race rocks, but be prepared. It’s tough.

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    4

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    scottrfrancis FIRST-TIMER '18

    Don't shy away from the stream crossings—you will get wet, so go hard and gain over those who shy away. Same goes for the downhills. Often the uphills (which are … MORE

    Don’t shy away from the stream crossings—you will get wet, so go hard and gain over those who shy away. Same goes for the downhills. Often the uphills (which are steep and long!) are single track, but the downhills are more wide open. I ran em hard—and shattered my legs, but, heck it’s racing!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    4
    SWAG
    4

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    mhyland REPEAT RUNNER '18

    Brazen races are hands down the best bang for your buck. The event is always well put together and has great swag/medals yet they still keep the entries priced fairly. … MORE

    Brazen races are hands down the best bang for your buck. The event is always well put together and has great swag/medals yet they still keep the entries priced fairly. The crowd is always fun with some brim competitive and some just out there to do their first trail run.

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    TrevLovesGSW REPEAT RUNNER '18

    Great race and great view of mount diablo. Met new people , nice friendly, raced with Forward Motions sports. Everyone should sign up for this race. MORE

    Great race and great view of mount diablo. Met new people , nice friendly, raced with Forward Motions sports. Everyone should sign up for this race.

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    octozooks REPEAT RUNNER '18

    If you like hills and you like beautiful views this is a good choice. Mt. Diablo offers really sweeping views of the Bay. Get ready for some hill climbing, but … MORE

    If you like hills and you like beautiful views this is a good choice. Mt. Diablo offers really sweeping views of the Bay. Get ready for some hill climbing, but the good news is there’s a sweet downhill descent to balance it all out. Lots of Creek crossings to cool your tired feet. The finish line is basically a party of folks having fun eating and getting free massages!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    octozooks FIRST-TIMER '17

    First 10k trail race. Nice challenge, a combination of fire trails, single track, stram crossings. Really fun! I loved seeing sections of the state park I had never visited. Good … MORE

    First 10k trail race. Nice challenge, a combination of fire trails, single track, stram crossings. Really fun! I loved seeing sections of the state park I had never visited. Good aid stations.

    DIFFICULTY
    3
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    jonoringading REPEAT RUNNER '18

    It was a perfect day, and the trails were soft from rain but not muddy. This course has a lot of climb, but I stopped at the peak of Mount … MORE

    It was a perfect day, and the trails were soft from rain but not muddy. This course has a lot of climb, but I stopped at the peak of Mount Diablo due to Shingles pain in my ear. I had a wonderful couple of miles with the amazing Catra Corbett and I missed one turn with a group of runners, but still give this course 5 stars since others were able to see the markings. (ok, only 4.98 stars, but I round up!) The RD gave me a half marathon medal since I ran 34.81 km on Garmin, and made it to Aid Station 4. I look forward to running this again next year!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    4

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    Profile photo of Raven Iacono
    sfdahliagirl REPEAT RUNNER '17

    I bet this course this year had more water crossings then any year EVER!! What a perfect day for a perfect race. 22 stream crossings and trails that were spectacular … MORE

    I bet this course this year had more water crossings then any year EVER!! What a perfect day for a perfect race. 22 stream crossings and trails that were spectacular = perfect race. I think we were even followed by a turkey. The volunteers and aid stations were spot on and the finish area was stocked to the gills. How can you say no to an IT’s IT? Come on, now.

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5
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    kayster FIRST-TIMER '17

    If you ever want to run with an amazing company, Brazen Racing is THE BOMB! These guys seriously know how to execute a race. I've run many of their races … MORE

    If you ever want to run with an amazing company, Brazen Racing is THE BOMB! These guys seriously know how to execute a race. I’ve run many of their races and plan to run many more. Many of their runs are trail and some are regular road races. They always offer a variety of distances to appeal to any level of runner: 5k, 10k, 13.1, 26.2 and even some 50k.

    Brazen Racing knows how to do it right. Their courses are well marked, aid stations well stocked and their finish line food is second to none. One really cool thing, too, is their hardware. Brazen has some of the best, if not, the best race medals around. They really are worth running for. After all, it’s all about the medal, right?

    Give them a run. You won’t be sorry you did.

    DIFFICULTY
    4
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5

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    Profile photo of Amy Schroll
    amy.schroll FIRST-TIMER '16

    4/24/16 - BRAZEN RACING The absolute best run I've ever participated in was my recent Save Mt. Diablo 10K Trail Run last weekend. There were luxury bus shuttles to Castle … MORE

    4/24/16 – BRAZEN RACING
    The absolute best run I’ve ever participated in was my recent Save Mt. Diablo 10K Trail Run last weekend. There were luxury bus shuttles to Castle Rock Park from Northgate High School and they ran frequently. A wonderful baggage check area was well organized, and they had lots of tents set up to assist people who hadn’t picked up their packets early.

    The course was beautiful with lots of hills and creek crossings. The drink/aid stations were the best part. They had all sorts of snacks, drinks, candy, treats, and even ice cold water to sponge you off if you wanted! It was amazing!

    At the finish, after receiving beautiful medals, delicious It’s It ice cream was being passed out. I picked pumpkin flavor and enjoyed the sweet treat before waiting in line for some chips, popcorn, fruit, cookies and candy. There was also a plate of BBQ available for $10, but I probably would pass this up next year – the event food was better than the plate I received.

    Everything about this race was perfect. It was absolutely my favorite event thanks to the great organizers and volunteers. Brazen racing is the best!

    DIFFICULTY
    5
    PRODUCTION
    5
    SCENERY
    5
    SWAG
    5
    My Media

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