Spring 2025 at Six Sigma Ranch
Ride solo or team up with friends and family to crush as many laps as you can in six hours! The Six Sigma 6 Hour Mountain Bike Race takes place on the flowy singletrack trails all around Asbill Valley on Six Sigma Ranch property. Each lap is approximately 8-9 miles and around 1,000’ of elevation gain. The most laps accrued in the shortest amount of time wins! Results will be available in real-time so you can see how you’re doing throughout the day.
Race Start: 8:00 AM
Cutoff time to start final lap: 2:00 PM
Cutoff time to complete laps: 3:00 PM
Join forces with friends and family to tackle the 6 Hour Race as a team! You and your teammates will complete as many laps as you can in six hours. The first rider will start their lap with the mass start at 8:00 AM. Each subsequent rider may begin their lap when the previous rider is finished. Teammates may do any number of laps they want in any order, but all team members must do at least one.
There will be a team exchange area located near the finish line in Asbill Valley, which is a great place to post up and cheer for your teammates!
Awards for the Six Sigma Six Hour MTB Race will be held on Saturday at 5:00pm at the Six Sigma Winery tasting room. Awards will be given to the top 3 finishers in each category, as well as:
The Outlier Award: Overall male and female fastest lap.
The Mean-est Rider: The rider with an average lap time closest to the “mean” lap time for all riders.
The Six Sigma Challenge Award: The individual or team with the least amount of variance between their laps. Minimum of four laps to qualify. Yes, this includes stop time!
For those superstar athletes, compete in both the 6 Hour MTB Race and the Stampede Trail Runs over the weekend for your shot at the Six Sigma Cup!
Race age is your age on December 31, 2025.
| Category | Notes |
|---|---|
| Category Solo Categories | Notes |
| Category Solo Open Men | Notes May be split into age groups depending on registration numbers |
| Category Solo Open Women | Notes May be split into age groups depending on registration numbers |
| Category Solo Single Speed Men | Notes |
| Category Solo Single Speed Women | Notes |
| Category Solo Men 50+ | Notes Race age is how old you will be on December 31, 2024 |
| Category Solo Women 40+ | Notes Race age is how old you will be on December 31, 2024 |
| Category Solo Beginner Men | Notes |
| Category Solo Beginner Women | Notes |
| Category Solo Vintage Bike | Notes Bike must be pre year 2000 |
| Category Duo Teams | Notes |
| Category Men Duo Team | Notes |
| Category Women Duo Team | Notes |
| Category Blend Duo Team | Notes |
| Category Vintage Duo Team | Notes Average team age is 50+. Race age is how old you will be on December 31, 2025. |
| Category Junior Duo Team | Notes All members under the age of 19. Race age is how old you will be on December 31, 2025. |
| Category 3-4 Person Teams | Notes |
| Category Men 3-4 Person Team | Notes |
| Category Women 3-4 Person Team | Notes |
| Category Blend 3-4 Person Team | Notes |
| Category Vintage 3-4 Person Team | Notes Average age of team is 50+. Race age is how old you will be on December 31, 2025. |
| Category Junior 3-4 Person Team | Notes All members under the race age of 19; everyone rides full course lap. |
| Category Grom 3-4 Person Team | Notes All members under the race age of 12; everyone rides short course lap. |
| Category 3-4 Person Family Teams | Notes |
| Category Grom Family 3-4 Person Team | Notes 1 adult & 2-3 Groms under the race age of 12, OR 2 Adults & 1-2 Groms. Groms complete their laps on a shorter course. |
| Category Junior Family 3-4 Person Team | Notes 1 adult & 2-3 Juniors under the race age of 19, OR 2 adults & 1-2 Juniors; everyone rides full lap course |
The 6 Hour MTB course features an almost all singletrack main loop that twists and turns on modern flowy trails throughout the Asbill Valley’s beautiful oak forests. Riders of all abilities will have a blast racing this loop! Each lap is approximately 8-9 miles and around 1,000’ of elevation gain. Trails are always being added and improved at Six Sigma thanks to local builder Ninja Trail Works, so the posted route is subject to change up until race week.
Groms under age 12 competing on a Grom Team or Grom Family Team will do their laps on a shortened course that stays in the valley on trails good for passing. Each Grom lap is approximately 1.7 miles with ~130 ft of elevation gain. Groms on the same team will be allowed to complete their laps at the same time to encourage camaraderie. Scoring for Grom Family and Grom Teams will be based on average number of laps completed by teammates and average race finish time of all teammates.
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Eight-race cyclocross series in the Sacramento area
Eight-race cyclocross series in the Sacramento area
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