BayTrailrunners

10/14/2026

🏔️🌲 THE TRAILS ARE CALLING… WHAT ARE YOU WAITING FOR? 🏃‍♂️🏃‍♀️

TWO GREAT EVENTS. FIVE DISTANCES. ONE INCREDIBLE DAY IN NAPA VALLEY!

📅 SATURDAY, MAY 15, 2027
📍 Skyline Wilderness Park | Napa, California

🔥 WHY WAIT TO SIGN UP WHEN SOME OF OUR LOWEST REGISTRATION PRICES ARE AVAILABLE RIGHT NOW?

The 2027 trail running season will be here before you know it, and now is the perfect time to put something exciting on your race calendar!

Whether you’re new to trail running, returning after some time away, looking to tackle a longer distance, or ready to test yourself on a challenging ultramarathon course, Bay Trailrunners has a place for you at the starting line.

And here’s the best part — you don’t have to break the bank to be part of an incredible trail running experience!

💥 REGISTER EARLY, SAVE MONEY, AND GIVE YOURSELF SOMETHING TO TRAIN FOR!

🌲 NAPA WILDERNESS TRAIL RUN

Four distances, each offering its own adventure through the rugged hills and beautiful landscapes of Skyline Wilderness Park.

🥾 10K – Perfect for beginners, returning runners, or anyone who enjoys a shorter trail challenge.

⛰️ 21K – A beautiful but demanding half-marathon adventure with plenty of climbing and rewarding views.

🌿 30K – Step beyond the half marathon and discover what you’re capable of on the trails.

🔥 50K – Take on the climbs, cover the miles, and experience the satisfaction of finishing an ultramarathon.

🐿️ RIMROCK 50 MILE ENDURANCE RUN

💪 50 MILES | APPROXIMATELY 10,000 FEET OF ELEVATION GAIN

Looking for something that will really challenge you?

The Rimrock 50 Mile Endurance Run delivers a demanding day of climbing, descending, technical trails, and unforgettable scenery.

Go the distance SOLO or grab a running partner and take on the TWO-PERSON RELAY!

It’s not about being the fastest. It’s about having the courage to take on the challenge and finding out just how far you can go.

🏕️ TURN YOUR RACE INTO A NAPA WEEKEND!

Why make it just a race day when you can make it a weekend adventure?

Camping is available through Skyline Wilderness Park. Arrive early, spend a night or two under the stars, meet other runners, and enjoy everything this beautiful park has to offer.

Camping reservations are handled directly through the Skyline Wilderness Park website.

🥤 WE’LL TAKE CARE OF YOU OUT ON THE COURSE!

Expect fully stocked aid stations with hydration, nutrition, snacks, friendly faces, and plenty of encouragement.

🌱 Vegetarian and vegan-friendly options available!

🙌 NOT RUNNING? COME VOLUNTEER!

Some of the best experiences happen on the other side of an aid station table!

Join our volunteer crew, support fellow runners, make new friends, and earn race credits toward future events.

❤️ SMALLER EVENTS. BIG ADVENTURES. GREAT PEOPLE.

At Bay Trailrunners, we believe trail running is about more than finish times and race results.

It’s about getting outside, exploring new trails, encouraging one another, meeting new friends, and sharing experiences that stay with you long after race day.

You don’t need to be an elite runner to belong here.

You just need a little determination, a sense of adventure, and the willingness to show up.

SO HERE’S THE QUESTION… WHY ARE YOU STILL WAITING?

✅ Some of our lowest registration prices are available now!

✅ Five distances to choose from!

✅ Plenty of time to train and prepare!

✅ A beautiful Napa Valley destination!

✅ A welcoming trail running community!

🎟️ REGISTRATION IS OPEN ON ULTRASIGNUP!

🌲 NAPA WILDERNESS TRAIL RUN — 10K | 21K | 30K | 50K

https://ultrasignup.com/register.aspx?did=139668

🐿️ RIMROCK 50 MILE ENDURANCE RUN — SOLO OR TWO-PERSON RELAY

https://ultrasignup.com/register.aspx?did=139618

📣 DON’T WAIT FOR THE NEXT PRICE INCREASE TO DECIDE YOU WANT TO BE THERE!

Sign up now, save some money, invite a friend, and start getting ready for an incredible day on the trails.

📅 MAY 15, 2027 — SKYLINE WILDERNESS PARK, NAPA!

Pick your distance. Set your goal. Run your own race. Write your own ending.

We can’t wait to see you at the starting line!

🐿️ Bay Trailrunners
Where the trails bring us together.

Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️ Victory Sportdesign Rim Rock 50 Mile Trail Challenge Tamalpa Runners. Friends of the Napa Open Space District Todd Run Tamalpa Headlands 50K Bay Area Ridge Trail Strava Redwood Road Runners B**r City Festival

10/13/2026

🏔️🌲 ONE INCREDIBLE DAY. TWO EPIC TRAIL RUNNING EVENTS. FIVE DISTANCES TO CHOOSE FROM! 🏃‍♀️🏃‍♂️

SATURDAY, MAY 15, 2027
📍 Skyline Wilderness Park | Napa, California

It’s time to start planning your 2027 race calendar!

Bay Trailrunners invites you to join us for two incredible trail running events in the beautiful hills overlooking Napa Valley!

Whether you’re taking on your first trail race, stepping up to a new distance, chasing a personal best, or looking for an unforgettable endurance challenge, we’ve got something for you.

🌲 NAPA WILDERNESS TRAIL RUN

Choose your adventure:

🥾 10K – A great introduction to trail running or a fun, challenging morning on the trails.

⛰️ 21K – Take on the hills, enjoy the scenery, and challenge yourself over a half-marathon distance.

🌿 30K – Ready for something longer? Experience more of Skyline’s beautiful and rugged terrain.

🔥 50K – A true ultrarunning adventure with challenging climbs, incredible views, and a rewarding finish.

🐿️ RIMROCK 50 MILE ENDURANCE RUN

💪 50 Miles | Approximately 10,000 Feet of Elevation Gain

Our ultimate endurance challenge! A demanding course through Skyline Wilderness Park, designed for runners ready to push their limits and experience what makes trail running so special.

Take it on solo or share the adventure as a two-person relay team!

🏕️ MAKE IT A WEEKEND IN NAPA!

Why rush home after your race?

Camping is available through Skyline Wilderness Park. Come up for one or two nights, enjoy the outdoors, connect with fellow runners, and make a full weekend out of your Napa adventure.

Camping arrangements and reservations are handled directly through the park’s website.

🥤 FULLY STOCKED AID STATIONS

We’ll have aid stations stocked with hydration, fuel, snacks, and plenty of encouragement to help you keep moving.

🌱 Vegetarian and vegan-friendly options available!

🙌 VOLUNTEERS MAKE THE MAGIC HAPPEN!

Not racing? Come be part of the experience!

We welcome volunteers to help at aid stations, the start/finish area, and throughout race day. Volunteer opportunities include race credits toward future events.

Bring your friends, family, and your best trail-running energy!

❤️ MORE THAN JUST A RACE

There’s something special about a day on the trails. The friendships, the encouragement, the challenges, the quiet moments, and that incredible feeling of crossing the finish line.

Come run your own race, find your own challenge, and write your own ending.

Whether it’s 10K or 50 miles, every distance is an accomplishment worth celebrating.

🎟️ REGISTRATION IS HOSTED BY ULTRASIGNUP

NapaWilderness
https://ultrasignup.com/register.aspx?did=139668

Rim Rock
https://ultrasignup.com/register.aspx?did=139618

Sign up early, choose your distance, and secure your place at the starting line!

🔗 Registration: UltraSignup.com

🏕️ Camping: Visit the Skyline Wilderness Park website for availability and reservations.

📅 MARK YOUR CALENDAR — MAY 15, 2027!

We can’t wait to welcome you back to Skyline Wilderness Park for another incredible day of trails, community, and adventure!

Bay Trailrunners
Where the trails bring us together.

Victory Sportdesign Bay Area Ridge Trail Todd Run B**r City Festival Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️ Rim Rock 50 Mile Trail Challenge Friends of the Napa Open Space District Strava Redwood Road Runners Tamalpa Runners Tamalpa Headlands 50K

09/30/2026

🌄 Start planning your 2027 race calendar!

Join us May 15, 2027, at Skyline Wilderness Park for the Napa Wilderness Trail Runs and Rimrock 50 Mile Trail Challenge—with beautiful trails overlooking the Napa Valley!

🏃 Choose your distance: 10K, 21K, 30K, 50K, or 50 miles. Bring a friend! Whether you’re new to trail running, getting back into it, or ready for a bigger challenge, this is the perfect venue for your next adventure.

🏕️ Make a weekend of it! Camping is available through Skyline Wilderness Park. Stay with us for one or two nights, run, cheer, and enjoy the trail community.

🙌 Want to volunteer? Opportunities are available with race credits!

🍊 Every aid station will be fully stocked with great nutrition and hydration, including vegetarian and vegan options.

📣 Last chance to sign up in September! Prices will increase in the near future, so choose your distance and register now on UltraSignup.

👇 Registration link below!

https://ultrasignup.com/register.aspx?did=139668

https://ultrasignup.com/register.aspx?did=139618

Todd Run 🏃‍♂️ Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️ Rim Rock 50 Mile Trail Challenge Skyline Wilderness Park Friends of the Napa Open Space District UltraSignup TRANSPORTS Sports Basement GU Energy Labs Victory Sportdesign Tamalpa Headlands 50K Tamalpa Runners B**r City Festival Bay Area Ridge Trail

08/22/2026

Just settling into Home for the next two months Todd Run

05/27/2026

Love this product — and we’re excited to share it again.

Long Run Coffee will be back with Bay Trailrunners in May 2027 for the third year!

At every event, we serve Long Run’s electrolyte-infused coffee before the run and around the campsite leading into race day. If you didn’t try it this year, you missed out. I’m using it every day now and absolutely love it.

Join us Saturday, May 15, 2027 at Skyline Wilderness Park in Napa for the Napa Wilderness Trail Runs and Rimrock 50 Mile.

Get there early, grab a cup, and start your trail day right.

Long Run Co. Todd Run Bay Area Ridge Trail UltraSignup Rim Rock 50 Mile Trail Challenge Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️ BayTrailrunners Friends of the Napa Open Space District Skyline Wilderness Park

Napa Wilderness Registration
https://ultrasignup.com/register.aspx?did=139668

Buy Long Run Coffee
https://longrun.co/?srsltid=AfmBOopJ39AKSZ-AOmtbSilHmnrJPEM_h65_x4QMBPxyHu5ukDxx0n0w

05/21/2026

it’s my job to make sure the park is left cleaner than when we found it today when picking up the last of my totes from the Remote aid station the Park Director had had reports of ribbons still out on the course so here I went already had run my 6 mile loop this morning but had to go sweep the sweepers 8 miles and about 10 flags and a couple signs were completely clean and free to go see you next year

it was very warm out there

Todd Run Bay Area Ridge Trail Rim Rock 50 Mile Trail Challenge BayTrailrunners Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️ Victory Sportdesign Friends of the Napa Open Space District Skyline Wilderness Park Yousef Gourmet Foods Long Run Co. Run The Alps

05/21/2026

We’re BACK for 2027.
Saturday, May 15 — the returns bigger, tougher, and even more scenic.

We’re expanding deeper into Napa Open Space, adding even more trails, more views, and one more aid station to keep the adventure rolling. But don’t worry… for those of you taking on the longer distances, the brutal beauty of Rimrock and the Chaparral Trails are still waiting for you.

Steep climbs. Fast descents. Rugged terrain. Big views.
The grassroots trail vibe you’ve come to love is coming back stronger than ever.

Early bird pricing is NOW OPEN.
Save your spot. Save money. Commit early.

Come run Napa with us.
May 15, 2027.
Do it now.

https://ultrasignup.com/register.aspx?did=139668

Bay Area Ridge Trail UltraSignup Todd Run Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️

Register Now!

05/20/2026

Just a few of the amazing photos from Jay Boncodin at the Rim Rock 50 Mile Trail Challenge Napa Wilderness Trail Run 🏃‍♂️ 🏃 🏃‍♀️

BayTrailrunners Friends of the Napa Open Space District Skyline Wilderness Park

05/19/2026

Photos from Napa Wilderness Trail Runs / Rim Rock are ready to view and download! 📸

View the gallery here: https://jayboncodin.zenfolio.com/p725012437

Password: napa2026

To download a photo, open the gallery, enter the password, find the photo you want, then right-click to download the image.

Enjoy, and congrats to all of the participants! Cheers!

05/18/2026

The winner of Rim Rock 50 Mile Trail Challenge Luke Masefield sent us this photo of a new trail friend he met on his journey Saturday.. Well done Luke

Todd Run UltraSignup Bay Area Ridge Trail