Santa Rosa Marathon 2026: Flat Course Through California Wine Country

The Santa Rosa Marathon returns August 22-23, 2026 for a full weekend of racing through the heart of California Wine Country. The 5K and 10K events take place on Saturday, August 22nd, while the half marathon and full marathon run on Sunday, August 23rd. This USATF-certified and Boston Marathon Qualifier course is known for its minimal elevation changes, making it a popular race for runners aiming to achieve qualifying times or personal records.

Santa Rosa Marathon 2026 by the numbers

The Santa Rosa Marathon returns August 22nd and 23rd, 2026 with runners starting and finishing at Old Courthouse Square in downtown Santa Rosa. The event offers four distances: 5K ($50.51-70.51), 10K ($72.77-92.77), half marathon ($117.27-157.27), and full marathon ($139.53-179.53).

The marathon features 126 meters (413 feet) of elevation gain distributed across 26.2 miles, creating an almost flat profile. In 2025, the race welcomed 1,349 finishers. That same year, 15.6% of participants achieved Boston Marathon qualifying times, demonstrating the course's speed potential.

Course breakdown

The 5K and 10K (Saturday, August 22nd)

The 5K and 10K races run through downtown Santa Rosa and along the Santa Rosa Creek Trail and Prince Memorial Greenway. These shorter formats let you experience the event atmosphere on shaded, paved trails—perfect for families and runners seeking an accessible wine country experience.

Half Marathon: downtown and greenways (Sunday, August 23rd)

The race begins in vibrant downtown Santa Rosa before quickly transitioning onto the Santa Rosa Creek Trail and Prince Memorial Greenway, with long, uninterrupted stretches of paved pathway winding alongside the creek. Runners follow the course westward to the turnaround point along Willowside Road, at about the 7-mile marker. The flat profile and well-maintained paths allow you to hold a steady pace from start to finish.

Full Marathon: from city to vineyards

Miles 0-5: urban start and greenway

The race begins in downtown Santa Rosa on 4th Street, right next to Old Courthouse Square, then the course transitions quickly onto the paved, tree-lined Santa Rosa Creek Trail and Prince Memorial Greenway before winding outward into the rural, agricultural areas northwest of the city. These opening miles are perfect for settling into your race pace.

Miles 5-12: heart of Sonoma County

The course continues along the picturesque Prince Memorial Greenway, then takes participants into the breathtaking landscapes of West Sonoma County from mile 8 to 19, including a memorable run through DeLoach Vineyards and even their barrel room. Mile 10 takes you through the vineyard and barrel room, a one-of-a-kind experience you won't find anywhere else. This section features quiet country roads lined with grapevines.

Miles 12-26.2: return to Santa Rosa

After the vineyard immersion, the course loops back toward Santa Rosa. You'll gradually return to the urban atmosphere with increasing crowds of supporters as you approach the finish. Success depends on maintaining a consistent effort through the country vineyard roads before returning for an energetic finish back at Old Courthouse Square.

What weather to expect

For late August in Santa Rosa, expect typical California summer conditions. Average temperatures range from 77°F (25.5°C) in the early morning to 85°F (29.5°C) by midday. Historical data shows high probability of rain for this period, though Northern California summers often alternate between dry spells and isolated storms. Wind remains moderate, around 10 mph in maximum gusts.

Plan for light, breathable gear, but stay alert to the forecast in the days before the race. Hydration will be crucial: even if temperatures aren't extreme, the midday heat can hit hard, especially on exposed portions through the vineyards. Start your race at a conservative pace to avoid burning out in the early miles under the rising sun.

Race strategy and tips

Pace management

A practical pacing strategy focuses on locking into a steady pace early along the flat, uninterrupted paths of the Santa Rosa Creek Trail, because the course lacks sharp turns outside the city or significant hill climbs. The nearly flat profile can be deceptive: save energy for the final 10K. One runner reports: "Not many hills overall, fast start. Felt too good before mile 17 and overdid my pace, slowing me dramatically on the last 10K".

Hydration and nutrition

With summer temperatures, adopt a rigorous hydration strategy from the start. Hit every aid station, even if you don't feel thirsty yet. For the marathon, plan your gels or energy bars for key moments, especially before and after the vineyard passage (around miles 9-12) where the scenery can make you forget the effort.

Managing exposed sections

The vineyard portions between miles 5 and 12 offer little shade. If the sun's beating down, slow slightly rather than burning yourself out. The heat accumulated in this section can catch up with you on the return to Santa Rosa.

Enjoying the unique course

The passage through the DeLoach Vineyards barrel room around mile 10 is a special moment. Savor it, take a few seconds to appreciate the experience, but don't break your rhythm. It's also a good mental marker: if you're feeling good there, you're on track.

What makes this race special

The full marathon course extends into west Sonoma County passing by scenic vineyards and even running through the barrel room of DeLoach Vineyards, making this a truly unique race. The race route features sights notable for the area—from the trestle bridges that cross the creek to the glorious farmlands and wine vineyards that dot the landscape.

Whether you run the 5K, 10K, half marathon, or marathon, you'll join an after-party with complimentary beer (if 21+) at Old Courthouse Square in downtown Santa Rosa. 5K and 10K runners enjoy one complimentary beer, while half marathon and marathon runners receive two complimentary beers and a bottle of wine from DeLoach Vineyards.

Important practical detail: There will be no race day packet pickup for any races. You must pick up your packet on Friday or Saturday (for half and full marathons) or have your packet mailed to you. The organization allows packet mailing until August 2, 2026. Plan this logistics point ahead.

Getting encouragement during the Santa Rosa Marathon with Cobbr

At mile 17, when the heat starts weighing on you and the finish line still seems far away, a voice message from your loved ones can make all the difference. The Cobbr app lets your family and friends record encouragement messages that trigger automatically at the mile marker of their choice during your race. Imagine hearing your partner's voice just before entering the vineyards, or your kids cheering as you cross the finish line at Old Courthouse Square. Those few words at the right moment transform tough stretches into moments of strength.

Santa Rosa Marathon 2026 FAQ

What distances does the Santa Rosa Marathon offer?

The event offers four distances: 5K and 10K on Saturday, August 22nd, and half marathon (13.1 miles) and full marathon (26.2 miles) on Sunday, August 23rd, 2026. All courses start and finish at Old Courthouse Square.

Is the course difficult?

No, it's known as a flat and fast course. The marathon has only 126 meters (413 feet) of elevation gain spread over 26.2 miles. It's an excellent choice for targeting a personal record or Boston qualifier.

Are there time limits?

Specific cutoff times aren't publicly detailed, but as a USATF-certified and Boston-qualifying race, the marathon follows standard requirements. Contact the organization for precise details if you're planning a slower pace.

Is this race suitable for beginners?

Absolutely. The flat profile and multiple distances (especially the 5K and 10K) make this an accessible event. The half marathon is also an excellent option for a first 13.1 thanks to the rolling, well-organized course.

What's the weather like in August in Santa Rosa?

Late August in Santa Rosa typically sees temperatures between 77-85°F (25-30°C). Mornings are cool, afternoons warm. California summer is generally dry, but isolated precipitation remains possible. Prepare to run under summer sun.

Can you receive encouragement during the race?

Yes, and it's highly recommended. With the Cobbr app, your loved ones can record voice messages that trigger automatically at the mile markers you choose. This is particularly useful during the tough moments of the marathon, like the vineyard passage or the return to the city.

The Santa Rosa Marathon combines everything that makes a great race: a fast, certified course, an exceptional setting through Sonoma County vineyards, and thoughtful organization with a great after-party. Whether you're targeting Boston or simply an unforgettable Wine Country experience, mark your calendar for August 22-23, 2026.