The Good Dog-Dirty Dog 5K & 10K Trail Runs

The Gold Rush Growler 10 Mile & 5K Trail Runs

Enjoy beautiful well-marked courses at Folsom Lake SRA for a 5K or 10 Mile run followed by ice-cold IPA beer.

Event details and schedule

The Gold Rush Growler 5K & 10 Miler

Granite Beach, Folsom Lake SRA

The Gold Rush Growler 10 Mile Trail Run and 5K will have New Courses for 2026 - along with post race ice cold beer and a custom Gold Rush Growler Finisher Beer Glass! Commemorative Gold Rush Growler race shirts are available for $20 in mens and womens cut.

The Gold Rush Growler Trail Runs start and finish at Granite Beach, Folsom Lake SRA with beautiful scenic courses along the shoreline and on single track trails.

First place Overall Male and Female in The Gold Rush Growler 10 Miler & 5K will receive Overall Champion Awards. There will be awards three deep in each ten-year age group for The Gold Rush Growler 10 Miler and the 5K Run plus Gold Rush Growler Beer Glasses.

Packet Pick Up Information

Race packets will be available race morning from 6:30 am to 8 am at the race site.

Race Day Schedule

6:30 Registration/Packet Pick up opens

7:00 Race announcements begin

8:00 Start of Gold Rush Growler 10 Miler

8:10 Start of Gold Rush Growler 5K

Refund and Transfer Information

TBF Racing has a No Refund policy on all of our events. A Refund requested prior to race week will be given a TBF Race credit for the amount of the entry fee minus a $25 processing fee. Credits are not given during race week. Transfers are allowed from one TBF Racing event to another within a one-year time frame. There is a $25 transfer fee. Transfers are not allowed during race week. ALL TBF Racing events are held Rain or Shine.

Race for FREE Information

Our Race for FREE Athlete Volunteer Program offers a chance to get involved with multi-sport events, have fun, and earn a $50 TBF Racing Volunteer voucher good towards entry fees at any of our events this year. Each volunteer shift is 4 hours. We ask volunteers to reserve a volunteer position at any of our events by emailing Volunteer Director [email protected] as our volunteer positions will fill up quickly.

Race fees increase on race day.

The Jewel of the Sierra Nevada

November 7-8, 2026

Welcome to the 2026 Rio Del Lago Endurance Runs Presented by Altra!

🎉 Celebrating 25 Years of the Rio 100 & 5 Years of the Rio 50K!

The celebration is on! The Rio Del Lago Endurance Runs presented by Altra return on November 7, 2026, marking the 25th anniversary of the legendary Rio 100 Mile Endurance Run and the 5th running of the fan-favorite Rio 50K.

Whether this is your first Rio or your twenty-fifth, we’re doing cartwheels to welcome you to this milestone year. Together, we’ll honor a quarter century of endurance, community, and trail magic on one of Northern California’s most iconic courses.

🌄 About the Races

Rio 100 Mile Endurance Run presented by Altra

A true test of grit, determination, and heart. The Rio 100 takes runners on a breathtaking journey from Folsom to Auburn and back, showcasing miles of rolling singletrack, river views, and the rugged beauty of the Sierra foothills.

Rio 50K Endurance Run presented by Altra

Now in its 5th year, the Rio 50K starts alongside the 100 milers at Beal’s Point and follows the scenic early miles of the course. With stunning views along Folsom Lake, Lake Natoma, and the infamous Johnny Cash Trail, it’s the perfect distance for your first ultra or your fastest 50K yet!

🌟 A Milestone Year — A Legendary Experience

As we celebrate 25 years of Rio, expect an unforgettable weekend filled with tradition, camaraderie, and celebration. From world-class race organization and well-stocked aid stations to the warmth of our incredible volunteers, this year’s event will capture everything that makes Rio Del Lago truly special.

🎽 All Entries Include:

• NorCalUltras Goody Swag Bag

• Commemorative 25th Anniversary Technical Race Shirt

• Finisher Medallion

• 100 Mile Finisher Belt Buckle (sub-30-hour finishers)

• 100 Mile Finisher Athleisure Lightweight Pullover

• Neversecond Gels on Course

• Skratch Hydration on Course

• B-Tag Chip Timing

• Bob and Brandt's Breakfast Bistro

• Chef Tim’s “Soup for the Soul”

• Beer Garden

🏕️ Plan Your Race Weekend

Visit our official website for detailed race information, course maps, and lodging options in our host city of Folsom, California.

💛 Join the Celebration

Be part of history as we honor 25 years of the Rio 100 and 5 years of the Rio 50K — a milestone weekend filled with tradition, community, and endurance.

25 Years Strong. 25 Years of Grit. 25 Years of Rio.

We can’t wait to celebrate this special year with you on the trails!

– The NorCalUltras Team

DESCRIPTION:

A FAMILY-FRIENDLY, ALL-COMERS 3-KILOMETER (1.86 MILE) FUN RUN AND WALK THAT STARTS ON WELLINGTON WAY NEAR THE GRANITE BAY HIGH SCHOOL PARKING LOT, AND VENTURES ALONG EAST ROSEVILLE PARKWAY, TRAVELS DOWN HILLSBOROUGH DRIVE, AND VENTURES BACK ALONG THE PEDESTRIAN SIDEWALKS OF EUREKA ROAD AND FINISHES IN FRONT OF GRANITE BAY HIGH SCHOOL ON WELLINGTON WAY.

6k course does 2 loops of the 3k course -- reversing course and doing it backwards!!!

3k: Clockwise

6k: Clockwise, then Counter-Clockwise

Date:

Thursday, November 26th, 2026

Time:

7:30am - 6k

8:00am - 3k

Location:

Wellington Way, in front of

Granite Bay High School,

#1 Grizzly Way,

Granite Bay, CA 95746

Parking:

GBHS Parking lot, or on the street along Wellington Way

Cost:

$35.00 early bird 07/31/2026-09/30/2026

$45.00 regular 10/01-10/31

$50.00 late 11/01-11/25

No Race Day Registration!

No Refunds unless extenuating circumstances (email me a love letter for refund consideration).

Additional online processing fee

bib, t-shirt, medal, CHIP timing, post-race snacks, and water and age group awards!

Course:

Starts on Wellington Way in front of Granite Bay High School, and follows a 1.86 mile, 3 kilometer clock-wise loop traveling along the pedestrian sidewalks only along East Roseville Parkway, Hillsborough Drive, Eureka Road, and back to Wellington Way. Course will be lightly traffic controlled by CHP and/or PCSO.

6k course does 2 loops of the 3k course -- reversing course and doing it backwards!!!

3k: Clockwise

6k: Clockwise, then Counter-Clockwise

Packet Pick-Up:

Granite Bay Public Library,

Wednesday, November 25th 2026

11am-6pm

Beneficiary:

Fieldhaven Feline Center, Lincoln

To Volunteer:

e-mail [email protected]

The New Year's Duathlon and 5K Trail Run

Run, Bike, and Run in the New Year with TBF at Granite Beach, Folsom Lake.

Event details and schedule

New Year's Duathlon & 5K Trail Run

Granite Beach, Folsom Lake SRA

Our New Years Duathlon has a 2 mile run - 5 mile bike – 2 mile run course for Individuals or 2-Person Relay Teams, and we have the New Year's 5K Trail Run on a beautiful and fun course with nature trails and lake views.

For the New Years Duathlon there will be an Overall Champion prize for the first overall male and female finisher along with Top Three awards in each 10-year Age Group. Overall Results will be posted for all finishers.

For the New Year’s 5K Run there will be an Overall Champion prize for the first overall male and female finisher along with Top Three awards in each 10-year Age Group. Overall Results will be posted for all finishers.

Courses.

Run - The 2 mile run course is the same for both legs of the race. The course will run on granite paths, single track trails, and a small section on pavement with an aid station at the start of the run and the half way point.

Bike - The 5 mile road bike course is on closed roads within Folsom Lake State Park. Care should be taken on several sharp turns so as not to exceed safe speed limits.

5K - The New Year's 5K course is a gentle rolling course on trails along the lake shoreline with beautiful views with freindly aid stations and lots of signs marking the course.

After the New Years Duathlon & 5K Run, hot soup along with cookies and fruit will be available to all competitors free of charge. The New Year's Duathlon & 5K Run are fundraising events for Maria and Joseph's Ministry to the Poor, the Official Charity of TBF Racing.

Pre-order your New Years Duathlon & 5K long-sleeved tech-tee shirt (available in XS, SM, MED, LG, XL and XXL) for only $30 and pick it up on race morning! Your purchase helps supports our official Charity! Must be pre-ordered prior to December 27th.

Race Day Schedule

6:30 am Transition area and Registration open

7:30 am Race announcements begin

8:00 am Start of the NY's 5K Run/Walk

8:30 am Race information announcement for New Year's Duathlon

9:00 am Start of New Year's Duathlon

TBF Racing always needs volunteers to help keep our events organized, safe, and fun. If you or a friend would like to volunteer, please email [email protected].

Refund and Transfer Information

TBF Racing has a No Refund policy on all of our events. A Refund requested prior to race week will be given a TBF Race credit for the amount of the entry fee minus a $25 processing fee. Credits are not given during race week. Transfers are allowed from one TBF Racing event to another within a one-year time frame. There is a $25 transfer fee. Transfers are not allowed during race week. ALL TBF Racing events are held Rain or Shine.