Tunnel Vision Marathon training plan: course, start dates, and plan options
North Bend, WAAugust 8, 2027
The Tunnel Vision Marathon spends all 26.2 miles going downhill on an unpaved rail trail in the Cascades, and partway along you run into the Snoqualmie Tunnel and out the other side. The organizers describe approximately 1,000 feet of net downhill, and the course descends roughly four feet for every one it climbs.
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That's why 20.4% of finishers ran Boston qualifying times in 2026 and 33.5% did in 2025. It's also why the last six miles hurt in a way flat marathons don't. Downhill is free speed right up until your quads lose the ability to absorb it, and after that it's the most expensive terrain in the sport.
318 days to race day
Tunnel Vision Marathon · August 8, 2027 · about 45 weeks out
Your plan starts with your race and works backward. Every week lands on a real calendar, with race day at the end.
When to start training for the Tunnel Vision Marathon 2027
Race day is August 8, 2027, which is 318 days from today. Counting back from that date, here is when each length of build starts.
- 30-week buildStart January 10, 2027
- 24-week buildStart February 21, 2027
- 18-week buildStart April 4, 2027
- 16-week buildStart April 18, 2027
- 12-week buildshortest Stride acceptsStart May 16, 2027
You have about 45 weeks until race day, so there is still room for a full build. Stride reads the runway you actually have and maps every week from today to August 8, 2027.
Answer a few questions, choose your plan, then create your account and subscribe to start training in Stride.
Tunnel Vision Marathon course facts
- Course
- Point to Point · Downhill · Trail
- Elevation gain / loss
- 267 ft gain, 1,137 ft loss
- Net elevation drop
- About 870 ft lower at the finish than the start
- Highest / lowest point
- 2,578 ft / 1,696 ft
- Marathon finishers
- 235 in 2026 (very small field)
- Boston qualifier
- Certified Boston qualifying course
- Finishers running a qualifying time
- 20.4% in 2026
- Typical race morning
- 58°F at the start, 81% humidity, clear
- Race day high / low
- 77°F / 54°F on average
Let’s find the plan for you.
Your race, current mileage, longest run, marathon experience, and available days decide the best fit. Stride maps the plan you choose to race day at the Tunnel Vision Marathon.
- Stride Run-Walk FinisherThree sessions a week with planned walk breaks, cover the full distance before race day.
- Stride First MarathonThe classic four-day first-marathon build: easy running and one weekly long run, no speedwork.
- Stride First Marathon PlusA first-marathon build with a little more volume and weekly race-pace miles.
- Stride 6-Day FinisherFinish your first marathon on frequency: six easy-leaning runs a week, no monster long runs.
- Stride 5-Day Pace BuilderFive days a week with race-pace runs before your long runs, built for a mid-pack time goal.
- Stride 6-Day RhythmSix days a week with three quality sessions, steady fatigue that teaches you to finish strong.
- Stride Time-Based FoundationFive time-based runs a week, mostly easy, the injury-averse way to a strong finish.
- Stride Time-Based BuilderSix time-based runs a week at a strict 80% easy / 20% hard split, chase a time goal without breaking.
- Stride 3-Day Cross-TrainThree runs plus two cross-training days over 24 weeks, marathon fitness on a busy schedule.
- Stride 3-Day QualityExactly three hard runs plus two mandatory cross-training sessions, every workout counts.
- Stride 6-Day CumulativeThe six-day cumulative-fatigue build with quality from week two, for PR chasers with a base.
- Stride Threshold 55The serious BQ/PR build to 55 miles a week: threshold work, medium-long runs, and 20-milers.
- Stride Threshold 70The high-mileage BQ/PR build to 70 miles a week for veterans with a deep base.
- Stride 2-Quality FlexTwo fixed quality sessions a week, everything else flexible easy running, fits any schedule.
Answer a few questions, choose your plan, then create your account and subscribe to start training in Stride.
Choose your Tunnel Vision Marathon training window.
Compare 12, 16, 18, and 20 weeks counted back from race day. The 18-week option includes the complete four-day schedule.
The course: a rail trail, a tunnel, and a descent that never stops
The Tunnel Vision Marathon is a point to point on an unpaved rail trail that drops steadily from start to finish, with the Snoqualmie Tunnel partway along it. The organizers describe approximately 1,000 feet of net downhill on a smooth rail trail surface, and the course is USATF certified, with certification finalized each year once the snow melts in May.
The tunnel is the part people remember and the part that changes how you run. A long stretch underground takes away your visual reference for speed, changes the footing and changes the temperature, so check the organizer's current guidance on lights before race week and treat that section as somewhere to hold effort rather than chase a split.
The grade is gentle and relentless, which is a different problem from a steep drop. At mile 6 it doesn't feel like it's costing you anything. Your legs are doing the same eccentric work over and over with no variation in it, and the bill for that arrives somewhere around mile 18.
How to train for the Tunnel Vision Marathon
Train your quads to absorb downhill running, because that's the whole race. A runner who prepares for this course on flat roads shows up with fit lungs, a good heart rate and legs that stop working after mile 18, when a couple of hours of accumulated descent has done its damage. No amount of aerobic fitness substitutes for that specific durability.
Start early and build gradually. From about 12 weeks out, put two to four miles of sustained gentle downhill into one run a week at goal effort, adding distance rather than steepness as you go. Run it with a quick, short stride and let gravity work instead of braking. Real soreness the first few times is the point of the exercise.
Then rehearse the surface. This is a trail race, not a road race, so do a meaningful share of that downhill work on packed gravel or dirt. Unpaved footing asks more of your stabilizers and slightly changes your stride, and finding that out on race day while descending is a bad plan.
Last, practise restraint in the first hour. The grade will hand you splits that look like a breakthrough. Pick a goal effort, run the first ten miles at it even when the watch says you could give more, and you'll still have quads at mile 22 when everyone around you doesn't.
Getting in
This is a small race and getting in isn't the challenge: 235 people finished the marathon in 2026 and 768 in 2025. Storm damage forced an alternate, fully permitted route with a different finish location for the 2026 events, so confirm the current route, start location and finish before you book travel to North Bend. Registration runs through the organizer.
Where does the Tunnel Vision Marathon get hard?
Miles 18 to the finish, when the gentle grade that handed you free speed for two hours has emptied your quads and every remaining downhill step costs more than the last.
What is the weather like at the Tunnel Vision Marathon?
Race morning at the start usually runs near 58F, clear, with humidity around 81% and almost no wind, and the day climbs toward an average high near 77F. Because the course finishes several hundred feet lower than it starts, you finish warmer than you began, and a slower finish means running the last hour in real August heat. Plan your fluids around the finish, not the start line.
Is the Tunnel Vision Marathon a good Boston qualifier?
It's a strong qualifier and, importantly, it doesn't carry a downhill penalty. 20.4% of finishers ran Boston qualifying times in 2026, 33.5% in 2025 and 34.6% in 2024, and the organizers state the marathon remains a Boston qualifier with no time penalty under the BAA's net downhill rules. Confirm that with the BAA for the year you plan to enter.
Is the Tunnel Vision Marathon a good first marathon?
It's a tempting first marathon and a slightly risky one. The descent makes early pace feel effortless, which is precisely the trap for someone who has never run 26.2 miles: you bank time for two hours and then discover your quads won't take another downhill step. If it's your first, run the opening ten miles slower than the course invites you to.
Tunnel Vision Marathon questions, answered.
How steep is the Tunnel Vision Marathon?
Gentle but constant. The race describes approximately 1,000 feet of net downhill spread across 26.2 miles of rail trail, descending roughly four feet for every one it climbs. No section is steep. The difficulty is that the descent never stops, so your quads do the same eccentric work for the entire race.
Is the Tunnel Vision Marathon a good Boston qualifier?
Yes, one of the better ones. 20.4% of finishers ran qualifying times in 2026, 33.5% in 2025 and 34.6% in 2024. The organizers state the marathon carries no time penalty under Boston's net downhill rules, though that ruling is worth confirming with the BAA for your entry year.
What is the Snoqualmie Tunnel like to run through?
It's a long underground stretch of the rail trail, and running it changes your footing, your temperature and your sense of pace, since there's very little to judge speed against. Check the organizer's current guidance on lights before race week, and run that section by effort rather than by watch.
Is the Tunnel Vision Marathon a good first marathon?
Only if you're disciplined. The downhill makes early miles feel effortless, and first timers routinely spend that gift before mile 15, then find their quads gone by mile 20. It's also a small race, with 235 finishers in 2026, so expect long solo stretches on the trail.
Where does the Tunnel Vision Marathon get hard?
Miles 18 to the finish, when the gentle grade that handed you free speed for two hours has emptied your quads and every remaining downhill step costs more than the last.
What is the weather like at the Tunnel Vision Marathon?
Race morning at the start usually runs near 58F, clear, with humidity around 81% and almost no wind, and the day climbs toward an average high near 77F. Because the course finishes several hundred feet lower than it starts, you finish warmer than you began, and a slower finish means running the last hour in real August heat. Plan your fluids around the finish, not the start line.
Is the Tunnel Vision Marathon a good Boston qualifier?
It's a strong qualifier and, importantly, it doesn't carry a downhill penalty. 20.4% of finishers ran Boston qualifying times in 2026, 33.5% in 2025 and 34.6% in 2024, and the organizers state the marathon remains a Boston qualifier with no time penalty under the BAA's net downhill rules. Confirm that with the BAA for the year you plan to enter.
Is the Tunnel Vision Marathon a good first marathon?
It's a tempting first marathon and a slightly risky one. The descent makes early pace feel effortless, which is precisely the trap for someone who has never run 26.2 miles: you bank time for two hours and then discover your quads won't take another downhill step. If it's your first, run the opening ten miles slower than the course invites you to.
When should I start training for the Tunnel Vision Marathon 2027?
Race day is August 8, 2027. Counting back from that date, a 20-week build starts around March 21, 2027, a 16-week build around April 18, 2027, and a 12-week build around May 16, 2027. Already inside that window? Stride maps a plan from today to race day, whatever the runway.
How does Stride's Tunnel Vision Marathon plan work?
Download the app, pick the Tunnel Vision Marathon as your race, and answer a few questions about your recent running and your weekly schedule. Stride matches you to one of 14 marathon plans, maps every week from today to August 8, 2027, adjusts when life gets in the way, and puts you in a feed of runners training for the same race.
Choosing a training app?
A Tunnel Vision Marathon buildup is months of your life. See how Stride compares before you commit it to an app.
Training for a different race?
Find your plan.
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