Skagit Flats Marathon: Pacing & Race-Day Strategy
Dead-flat farm roads through the Skagit Valley: a small, no-frills race built for honest PRs.
Last updated
No date announced yet
The 2027 date has not been announced yet. The race has historically run in mid-September.
- Where:
- Burlington, Washington
- When:
- September
- Course:
- Flat · out-and-back
- Best run as:
- Even pace
Course & elevation
Skagit Flats is as flat as a marathon gets, running an out-and-back over the quiet agricultural roads of the Skagit Valley with barely a ripple of grade the whole way. The lack of hills and the small, low-key field make it a sneaky-fast Boston-qualifying course; the only real variable is wind across the open farmland.
- Start → Finish
- 40 → 42 ft
- Net
- +2 ft
- Total gain
- ≈ 93 ft
The certified route
Several out-and-back sections on flat farmland roads around Burlington, including Peterson Rd, Pulver Rd, Maiben Rd, Benson Rd, Thomas Rd, Field Rd, Church Rd, Farm to Market Rd and T-Loop Rd, starting and finishing at the Burlington-Edison High School track.
- Start
- 14 ft 8 in west of the 2nd light post west of the bus gate (2 ft 8 in east of the blue cement section).
- Finish
- Orange mark on the BEHS track infield adjacent to the west edge of the meter box, west of Fields center.
Underfoot
Almost entirely paved, with about 2 percent on the track.
Through, in order
Burlington
What you pass
- The turnaround at the fire hydrant just south of the Thomas Rd and Sunset Rd intersection
- Miles 9 to 13: the out and back on Field Rd and Church Rd
- Miles 18 to 20: the T-Loop Rd turnaround
Worth knowing
- Runners use the entire road surface unless coned.
- Certified splits are listed on the certificate.
Transcribed from the USATF certificate for Skagit Flats Marathon (WA21009RMB), measured 5 July 2021. Where the certificate is silent, so are we.
Key moments
- Mile 1–6Flat farm-road start through the valley. Settle into goal pace and read the wind direction.
- Mile 13The turnaround on the out-and-back; note whether you’ve had a tailwind or headwind so far.
- Mile 20–26.2Open, exposed farmland to the finish; tuck behind others if the wind has turned against you.
Pacing strategy
With no hills to manage, this is a pure even-pacing course, so lock into goal pace early and hold it. Pace by effort into any headwind on the return leg rather than forcing splits, and draft on the exposed stretches.
Pacing by goal time
Checkpoint splits for four common goals at Skagit Flats Marathon. These are effort-even rather than pace-even: the paces shift with the course profile, so climbs are slower and descents faster by the amount the grade actually costs. For any other goal time, use the planner below.
| Checkpoint | Sub-3:00 | Sub-3:30 | Sub-4:00 | Sub-4:30 |
|---|---|---|---|---|
| Mile 3.1 | 20:366:50/mi | 24:027:59/mi | 27:289:07/mi | 30:5410:16/mi |
| Mile 6.2 | 41:156:54/mi | 48:088:03/mi | 55:019:13/mi | 1:01:5310:22/mi |
| Mile 9.3 | 1:01:506:54/mi | 1:12:098:03/mi | 1:22:279:12/mi | 1:32:4610:21/mi |
| Mile 12.4 | 1:22:266:50/mi | 1:36:117:59/mi | 1:49:559:07/mi | 2:03:3910:16/mi |
| Mile 15.5 | 1:43:026:51/mi | 2:00:127:59/mi | 2:17:239:07/mi | 2:34:3310:16/mi |
| Mile 18.6 | 2:03:386:53/mi | 2:24:148:02/mi | 2:44:519:11/mi | 3:05:2710:20/mi |
| Mile 21.7 | 2:24:116:53/mi | 2:48:128:01/mi | 3:12:149:10/mi | 3:36:1610:19/mi |
| Mile 24.9 | 2:44:456:50/mi | 3:12:127:59/mi | 3:39:409:07/mi | 4:07:0710:15/mi |
| Finish | 2:58:306:53/mi | 3:28:158:02/mi | 3:58:009:10/mi | 4:27:4510:19/mi |
Splits assume even effort and are adjusted for this course's climbs and descents, which cost more than they give back. A model, not a promise: wind and heat move real splits around. See how the pacing model works.
Plan your mile splits
Turn your goal time into a mile-by-mile plan for Skagit Flats Marathon, built from this course's elevation. The even pace approach comes pre-selected, and grade-adjusted pacing evens out your effort across the climbs and descents.
Plan Skagit Flats Marathon splitsFueling & hydration
Aid stations sit roughly every 2 miles with water and sports drink along the out-and-back. The metronomic flat rhythm makes a fixed gel schedule effortless to keep; just don’t let the steady pace lull you into skipping one.
Weather
Mid-September in the Skagit Valley brings cool, often misty mornings (45–55°F), comfortable racing weather, with wind the main thing to watch on the open roads.
What race morning has actually been like
The last 5 editions of Skagit Flats Marathon, measured at the start line rather than averaged across the month. Starts have run 52–61°F, averaging 57°F.
| Year | Date | Start | Dew pt | Wind | By late morning |
|---|---|---|---|---|---|
| 2021 | Sep 12 | 57°F | 57°F | 3 mph | 57°F |
| 2022 | Sep 11 | 58°F | 52°F | 6 mph | 76°F |
| 2023 | Sep 10 | 52°F | 56°F | 3 mph | 69°F |
| 2024 | Sep 8 | 56°F | 60°F | 3 mph | 70°F |
| 2025 | Sep 14 | 61°F | 58°F | 5 mph | 63°F |
The gap between the gun and late morning matters here. In 2022 it went from 58°F at the start to 76°F by late morning. A four-hour finisher ran a materially different race from a three-hour one.
Dew point has reached 60°F (2024). Above about 60°F, sweat stops evaporating efficiently and most runners lose pace no matter what the thermometer says. It is the number to watch here, not the air temperature.
Dates derived from the race's published pattern (2nd Sunday in September), observations at Burlington, WA (start). Source: Open-Meteo historical reanalysis (ERA5), 7-11am local at the start line. Reanalysis is modelled from station observations, so treat it as a close record rather than an official one. See how race-morning weather is built.
Is Skagit Flats Marathon a good Boston qualifier?
Yes. The course actually finishes 2 ft higher than it starts, so no downhill adjustment applies, and nobody can accuse the time of being gravity-assisted.
This drop is our estimate rather than a figure from the course's certificate. If it sits near a threshold, confirm with the organizer.
Compare every course, how the downhill bands work, or work out your own target.
Dial in your pacing & fueling
New to how training builds toward a race like this? Start with Anatomy of a Running Plan, find your zones with the pace calculator, and plan race-day nutrition with the fueling calculator.
Related marathon guides
- Tunnel Light MarathonNorth Bend, Washington · SeptemberAlso run in September
- Eugene MarathonEugene, Oregon · Apr 25, 2027In neighboring Oregon
- Mississippi Gulf Coast MarathonPass Christian, Mississippi · Dec 13, 2026Another flat course
- Santa Rosa MarathonSanta Rosa, California · Aug 22, 2027Another flat course
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