Rise to the challenge!
The longer you go, the more you see and experience! Courses are all on dirt trails, heading out from Castle Rock park in Walnut Creek, heading into Mount Diablo State Park -- all the way to the summit for the 50K.
SPECIAL HOTEL RATES FOR 2023
Looking for a local hotel to stay at? Check out the link below for rooms available at discounted rates just for Trails Challenge runners. But don't wait too long, these special discounts are only available to those booking rooms through 3/29/23.
These courses run on dirt trails with the 50K, half marathon and 10K including sections of single track.
COURSE TIME LIMITS
The 50K will start at 6:30 am and the course will have a time limit of 11 hours.
All runners must also reach and depart the aid stations below before the noted times:
Curry Point (mile 15.6): 11:30 am
Summit (mile 19): 1:30 pm
Juniper (mile 25.5): 3:30 pm
Burma (mile 28.4): 4:45 pm
The half marathon will start at 8:30 am and the course will have a time limit of 4.5 hours. Runners must reach the 3rd aid station, Curry Point (mile 7.9) by 11:45 am.
Pacers will be allowed for the 50K runners, starting at the Curry Point aid station (mile 15.6). All pacers are required to check in at the aid station and sign a waiver. There is no transportation provided for pacers.
COURSE MAPS + ELEVATION
(Click on maps to view larger)
Want to follow the course with your phone or smart watch and know how to work with GPX files? You can do that by uploading the race course GPX file (created with "Ride With GPS") into your favorite app. GPX files are on the course map.
Important Note: We recommend right-clicking and choosing "save as" to download.
Each course will be marked with colored ribbons, signs, and flour. Runners unfamiliar with the courses should carry a copy of the course map to ensure they stay on course.
Water stations will be stocked with water, sports drink, gels, pretzels, candy, etc.
We recommend all 10K and half marathon runners carry at least 2 bottles or a large hydration pack (or both).
Please note: All 50K water stations will be cupless. 50K participants must carry a hydration pack and/or water bottles.
The 50K water stations, their distance into the race and their cut-off times are as follows:
Rock City: 6.2 (no cut-off)
CCR: 12.5 (no cut-off)
Curry Point: 15.6 (cut-off = 11:30 am)
Summit: 19 (cut-off = 1:30 pm)
Juniper: 25.5 (cut-off = 3:30 pm)
Burma: 28.4 (cut-off = 4:45 pm)
The half marathon will have 4 aid stations (at miles 1.1, 2.8, 7.8 and 12.36).
The 10K will have 3 aid stations (at approximately miles 1.1, 2.8 and 5.1).
The 5K will have an aid station located shortly before the turn around point (about mile 1.1 and then again at mile 2).
Note: To lower the amount of waste at our Ultra Half Series races, we ask that our half marathon runners (and all runners where possible) be "cupless" during their runs, especially at the half-marathon-only water stations.
Since the course and conditions of these half marathon courses already dictate that carrying water bottles/hydration packs is the best practice, this is usually easy to do. Water station volunteers will be ready to refill whatever container one brings. Runners can also carry reusable cups that easily collapse and can be stuffed into their pockets/attached. If you wish to purchase a Hydrapak Speed Cup (available for $5 with sales tax), we have those available at our merchandise tent.
Half marathon water stations will not have full cups waiting for runners, but safety is their priority and so if you have nothing and need the fluids, they will get a cup for you.
Thank you to our race sponsors, through their contributions, our sponsors help keep entry costs down and expose our runners their outstanding products and services. Learn more about becoming a sponsor.