12-Week Napa Valley Marathon Training Plan

Napa, CAMarch 7, 2027

Start around December 13, 2026. The calendar below gives each phase a real date, then the course guidance shows where to make the build specific to Napa Valley Marathon.

The Napa Valley Marathon runs 26.2 miles down the Silverado Trail from Calistoga to Napa with four turns in the entire race, all of them inside the final four miles. You drop about 303 feet net, a figure the organizers publish themselves, and you climb 564 feet along the way, which is the part people forget.

Race day
March 7, 2027
Start window
December 13, 2026
Runway
12 weeks
Course
Downhill · Point to Point
Plan choice
Current training

Does this window fit your starting point?

Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time.

  • Your weekly mileage has been consistent for the last six to eight weeks.
  • You have completed recent long runs and do not need to rebuild from three easy miles.
  • You can protect the same number of run days from week one through race week.
  • You are prepared to begin race-specific work early instead of using a long base phase.

The 12-week Napa Valley Marathon calendar

These dates define the job of each phase. Your current mileage, recent longest run, experience, goal, and available days still decide the actual workouts inside them.

Settle

Weeks 1–2

Dec 14, 2026–Dec 27, 2026

Hold close to your current volume, establish the weekly rhythm, and make sure the opening load is honest.

Build

Weeks 3–7

Dec 28, 2026–Jan 31, 2027

Grow the long run and weekly work with step-back weeks intact. There is no room to repay missed mileage.

Peak

Weeks 8–10

Feb 1, 2027–Feb 21, 2027

Complete the most race-specific long runs, rehearse fueling, and practice the terrain that will decide the final 10K.

Taper

Weeks 11–12

Feb 22, 2027–Mar 7, 2027

Reduce volume, keep the routine familiar, and arrive on race day without trying to squeeze in one more big week.

Make the window specific to Napa Valley Marathon.

Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days.

Read the full race guide

How to train for the Napa Valley Marathon

Train for the Napa Valley Marathon by building downhill durability and tolerance for rhythm that never breaks. The course sheds 867 feet across 26.2 miles, which loads your quads eccentrically for three straight hours, and it runs almost entirely in one direction on one road, so nothing interrupts your stride.

Do the quad work early and often. Run gentle grades, one to three percent, at goal pace or a touch faster, with a short quick stride and no braking. Six to eight of these across a build changes how mile 20 feels here. And don't skip climbing: there are 564 feet of it, in small rises that arrive when you've already been descending, so put short uphill segments inside those downhill sessions.

Then practice the monotony on purpose. Find the longest uninterrupted road you can and run 16 to 18 miles of it with no turns, no stoplights and no change of scenery. It sounds trivial and it isn't. With no turns for 23 miles you get no rhythm breaks and no landmarks to chop the race into pieces, so have a plan for what you do with your head between aid stations.

Napa Valley Marathon course facts

Course
Point to Point · Downhill · Road/Pavement
Elevation gain / loss
564 ft gain, 867 ft loss
Highest / lowest point
395 ft / 56 ft
Marathon finishers
1,942 in 2026 (mid-size field)
Boston qualifier
Certified Boston qualifying course
Finishers running a qualifying time
12.5% in 2026
Typical race morning
45°F at the start, 88% humidity, mostly cloudy
Race day high / low
60°F / 42°F on average

Sources

Let your current training decide the actual plan.

Current mileage, recent longest run, marathon experience, goal, and available days determine which plans rank first. After you choose and subscribe, Stride dates every workout through March 7, 2027.

Build My Plan

12-week Napa Valley Marathon plan questions, answered.

When should I start a 12-week Napa Valley Marathon plan?

The 2027 Napa Valley Marathon is scheduled for March 7, 2027, so the 12-week window opens around December 13, 2026. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Is a 12-week plan long enough for the Napa Valley Marathon?

Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.

How should I prepare for the Napa Valley Marathon course in 12 weeks?

Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days. Train for the Napa Valley Marathon by building downhill durability and tolerance for rhythm that never breaks. The course sheds 867 feet across 26.2 miles, which loads your quads eccentrically for three straight hours, and it runs almost entirely in one direction on one road, so nothing interrupts your stride.

What if the 12-week Napa Valley Marathon window has already started?

Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.

Is the Napa Valley Marathon downhill?

Net downhill, yes, but not steeply. The Napa Valley Marathon drops 303 feet net from Calistoga to Napa, with 867 feet of descent and 564 feet of climbing along the way. It runs from about 395 feet down to 56 feet, so the grade is gentle and continuous rather than dramatic.

What is the Napa Valley Marathon cutoff time?

Six hours, enforced strictly, which works out to 13:44 per mile. Runners who haven't reached mile 22.7 by 12:45 p.m. are shuttled to the finish. The race starts at 7:30 a.m. on the Silverado Trail at Brannan Street in Calistoga. Check that against a realistic finish time before you enter.

Put the 12-week window against your actual race.

Each page counts back from race day, maps the 4 phases to real dates, and applies the window to that course and its typical conditions.