This scenic and fast 13.1 mile course starts at Cuvaison Carneros Winery where runners congregate in one of the most beautiful start areas anywhere. You’ll warm up next to the winery alongside rows of rolling vineyards and a reservoir. Runners must be dropped at the entrance to the winery by bus or by vehicle in the Domaine Carneros parking lot. There is NO parking there or anywhere near the start area!

Out of the starting gate, you’ll take a left turn on Duhig Rd. and make your ascent up Butt Burner Hill. Once over the crest it’s a beautiful cruise downhill into the Carneros wine appellation. Enjoy vistas of the Napa-Sonoma Marshes Wildlife Preserve, San Pablo Bay and Mt. Tamalpais in Marin as you wind through hundreds of rolling acres of vineyards and wineries. The course also passes ranches and farms filled with a variety of animals including horses, cows, pigs, sheep, goats, llamas, chickens and donkeys.

Please note that there has been a slight change in the last 1.5 miles of the course. The course now runs from Denmark St. to 7th St. East instead of Denmark to MacArthur via the Nathanson Creek Trail. Runners will then take a left on East Napa St. before finishing in the southeast quadrant of Sonoma Plaza.

The net elevation gain/loss is -77′ starting at 159′ finishing at 82′ with maximum elevation at 220′. The entire course is run on paved roads. This course is certified by USTAF; Certification code: CA06022RS

Download Course Map with Wineries NS_Half_5K_course-copy


Get Turn-by-Turn Directions and Elevation Information HERE, courtesy of RunGo

Start Line

The staging area for the start line is located at Cuvaison Carneros Winery in Napa County. Race Day Packet Pickup, bag check, water, sunscreen, and warm-ups are held in this area back near the tasting room. Proceed up the driveway past the start line to reach the staging area.

Please note that NO unauthorized vehicles are allowed on the course during the race! For more information on how to get to the start or finish please view the Transportation page.

IMPORTANT! Race participants must obey CHP, police and course marshals at all times! There are two key intersections where extra precaution must be taken. Runners will cross Hwy 121 at Mile 7.5, a major connector between the Sonoma and Napa Valleys, and will cross Napa Rd. at the 10-mile mark. Please group as much as possible to allow cars to get through and take extra caution as you approach any intersections where cars are stopped. Runners and racewalkers must stop if deemed necessary by CHP.


Time Limit

To enter the half marathon you must be able to finish the course in 3 hours and 30 minutes and keep a 16:00/mile pace or better. Casual walkers are not permitted in the half marathon due to this time limit. If you cannot keep the required pace on course, you will not be guaranteed course supervision by law enforcement and volunteers.

Transportation to the finish area for non-finishers without medical problems will be provided via the SAG vehicle. In the event you cannot finish the race, or fall behind the 16 min/mile pace, please make your way to the nearest aid station and ask for SAG assistance. The SAG vehicle will be following the final runner/walker and pick up at each aid station.


Aid Stations

Seven aid stations will be placed on-course between the start and finish areas. Various non-profits, school teams and other groups host these stations. They are placed on-course at key locations and intervals approximately 1.5 miles apart.

Water will be offered at each aid station and Nuun Hydration Drink will be provided at every other aid station.

Please show your appreciation to volunteers as you pass each aid station and obey the law officers and course monitors who are working hard to keep you safe and happy.


Post-Race Refueling Tent

After completing your 13.1 mile journey through wine country and receiving your finisher’s medal, you’ll pass through the Refueling Tent where you’ll be treated to a variety of post-race food and other beverages designed to help your body start the recovery process immediately.