4-Day Jack & Jill's Downhill Marathon Training Plan

North Bend, WAJuly 24, 2027

Four runs per week for 18 weeks: two easy runs, one midweek aerobic run, and one long run. The schedule stays fixed; the guidance below shows how to choose terrain, rehearse conditions, and prepare for the Jack & Jill's Downhill Marathon course.

At about mile 13 of Jack & Jill's Downhill Marathon you run 2.4 miles through an unlit railroad tunnel, and the race requires every runner to carry a headlamp or a small flashlight to do it. The Snoqualmie Tunnel is the halfway point of the race, and it is also the hinge the whole day turns on.

See the full 18-week plan Read the full race guide

Race day: July 24, 2027
18-week window: Around March 20, 2027
Course: flat to the tunnel, downhill after it
Peak week: 40 miles
Longest run: 20 miles

Your complete Jack & Jill's Downhill Marathon schedule

The 18-week window opens around March 20, 2027. Weeks one through 17 keep the normal Tuesday, Wednesday, Thursday, and Sunday rhythm. Only race week moves so the marathon lands on its actual weekday. If the window has passed, do not skip ahead or cram missed mileage into the time left.

Open any week to see all seven days. Week 1 is open to start.

1Week 1Foundation · 15 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

30 min easy cross-training or mobility

Thu

Easy

3 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

6 mi long run, conversational effort

2Week 2Foundation · 17 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

30 min easy cross-training or mobility

Thu

Easy

4 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

7 mi long run, conversational effort

3Week 3Recovery week · 15 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

Rest or 20 min gentle mobility

Thu

Easy

3 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

6 mi long run, conversational effort

4Week 4Build · 19 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

30–40 min easy cross-training

Thu

Easy

5 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run + 4 relaxed strides

Sun

Long run

8 mi long run, conversational effort

5Week 5Build · 22 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

30–40 min easy cross-training

Thu

Easy

5 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

10 mi long run; practice fluids

6Week 6Recovery week · 18 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

Rest or 25 min gentle cross-training

Thu

Easy

4 mi relaxed aerobic run

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

8 mi long run, conversational effort

7Week 7Build · 25 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

30–40 min easy cross-training

Thu

Quality

6 mi steady run; final 1 mi at planned marathon effort

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

12 mi long run; practice fuel and fluids

8Week 8Recovery week · 23 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

30 min easy cross-training or mobility

Thu

Easy

5 mi relaxed aerobic run

Fri

Rest

Sat

Easy

4 mi easy run + 4 relaxed strides

Sun

Long run

10 mi long run, conversational effort

9Week 9Build · 29 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

30–40 min easy cross-training

Thu

Quality

7 mi steady run; middle 2 mi at planned marathon effort

Fri

Rest

Sat

Easy

4 mi easy run

Sun

Long run

14 mi long run; use race-day fuel timing

10Week 10Recovery week · 24 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

Rest or 25 min gentle cross-training

Thu

Easy

5 mi relaxed aerobic run

Fri

Rest

Sat

Easy

4 mi easy run

Sun

Long run

11 mi long run, conversational effort

11Week 11Build · 32 mi

Mon

Rest

Tue

Easy

5 mi easy run

Wed

Cross-training

30–40 min easy cross-training

Thu

Quality

7 mi steady run; final 2 mi at planned marathon effort

Fri

Rest

Sat

Easy

4 mi easy run

Sun

Long run

16 mi long run; rehearse fuel, fluids, and kit

12Week 12Recovery week · 26 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

Rest or 25 min gentle cross-training

Thu

Easy

6 mi relaxed aerobic run

Fri

Rest

Sat

Easy

4 mi easy run + 4 relaxed strides

Sun

Long run

12 mi long run, conversational effort

13Week 13Peak week · 36 mi

Mon

Rest

Tue

Easy

5 mi easy run

Wed

Cross-training

30 min easy cross-training or mobility

Thu

Quality

8 mi steady run; middle 3 mi at planned marathon effort

Fri

Rest

Sat

Easy

5 mi easy run

Sun

Long run

18 mi long run; full race-day fueling rehearsal

14Week 14Recovery week · 29 mi

Mon

Rest

Tue

Easy

5 mi easy run

Wed

Cross-training

Rest or 25 min gentle cross-training

Thu

Easy

6 mi relaxed aerobic run

Fri

Rest

Sat

Easy

4 mi easy run

Sun

Long run

14 mi long run, conversational effort

15Week 15Peak week · 40 mi

Mon

Rest

Tue

Easy

6 mi easy run

Wed

Cross-training

30 min easy cross-training or mobility

Thu

Quality

9 mi steady run; middle 4 mi at planned marathon effort

Fri

Rest

Sat

Easy

5 mi easy run

Sun

Long run

20 mi long run; complete race-day rehearsal

16Week 16Taper · 26 mi

Mon

Rest

Tue

Easy

4 mi easy run

Wed

Cross-training

25 min easy cross-training or mobility

Thu

Quality

6 mi relaxed run; 2 mi at planned marathon effort

Fri

Rest

Sat

Easy

4 mi easy run

Sun

Long run

12 mi long run, controlled effort

17Week 17Taper · 18 mi

Mon

Rest

Tue

Easy

3 mi easy run

Wed

Cross-training

Rest or 20 min gentle mobility

Thu

Easy

4 mi relaxed run + 4 short strides

Fri

Rest

Sat

Easy

3 mi easy run

Sun

Long run

8 mi long run, conversational effort

18Week 18Taper · 8 mi + race

Sun

Rest

Mon

Easy

3 mi easy run

Tue

Rest

Rest or 15 min gentle mobility

Wed

Easy

3 mi easy run + 4 short strides

Thu

Rest

Fri

Easy

2 mi shakeout, or rest

Sat

Race

Marathon — 26.2 mi

Week	Mon	Tue	Wed	Thu	Fri	Sat	Sun	Run total
Week 1Foundation	Rest	3 mi easy run	30 min easy cross-training or mobility	3 mi relaxed aerobic run	Rest	3 mi easy run	6 mi long run, conversational effort	15 mi
Week 2Foundation	Rest	3 mi easy run	30 min easy cross-training or mobility	4 mi relaxed aerobic run	Rest	3 mi easy run	7 mi long run, conversational effort	17 mi
Week 3Recovery week	Rest	3 mi easy run	Rest or 20 min gentle mobility	3 mi relaxed aerobic run	Rest	3 mi easy run	6 mi long run, conversational effort	15 mi
Week 4Build	Rest	3 mi easy run	30–40 min easy cross-training	5 mi relaxed aerobic run	Rest	3 mi easy run + 4 relaxed strides	8 mi long run, conversational effort	19 mi
Week 5Build	Rest	4 mi easy run	30–40 min easy cross-training	5 mi relaxed aerobic run	Rest	3 mi easy run	10 mi long run; practice fluids	22 mi
Week 6Recovery week	Rest	3 mi easy run	Rest or 25 min gentle cross-training	4 mi relaxed aerobic run	Rest	3 mi easy run	8 mi long run, conversational effort	18 mi
Week 7Build	Rest	4 mi easy run	30–40 min easy cross-training	6 mi steady run; final 1 mi at planned marathon effort	Rest	3 mi easy run	12 mi long run; practice fuel and fluids	25 mi
Week 8Recovery week	Rest	4 mi easy run	30 min easy cross-training or mobility	5 mi relaxed aerobic run	Rest	4 mi easy run + 4 relaxed strides	10 mi long run, conversational effort	23 mi
Week 9Build	Rest	4 mi easy run	30–40 min easy cross-training	7 mi steady run; middle 2 mi at planned marathon effort	Rest	4 mi easy run	14 mi long run; use race-day fuel timing	29 mi
Week 10Recovery week	Rest	4 mi easy run	Rest or 25 min gentle cross-training	5 mi relaxed aerobic run	Rest	4 mi easy run	11 mi long run, conversational effort	24 mi
Week 11Build	Rest	5 mi easy run	30–40 min easy cross-training	7 mi steady run; final 2 mi at planned marathon effort	Rest	4 mi easy run	16 mi long run; rehearse fuel, fluids, and kit	32 mi
Week 12Recovery week	Rest	4 mi easy run	Rest or 25 min gentle cross-training	6 mi relaxed aerobic run	Rest	4 mi easy run + 4 relaxed strides	12 mi long run, conversational effort	26 mi
Week 13Peak week	Rest	5 mi easy run	30 min easy cross-training or mobility	8 mi steady run; middle 3 mi at planned marathon effort	Rest	5 mi easy run	18 mi long run; full race-day fueling rehearsal	36 mi
Week 14Recovery week	Rest	5 mi easy run	Rest or 25 min gentle cross-training	6 mi relaxed aerobic run	Rest	4 mi easy run	14 mi long run, conversational effort	29 mi
Week 15Peak week	Rest	6 mi easy run	30 min easy cross-training or mobility	9 mi steady run; middle 4 mi at planned marathon effort	Rest	5 mi easy run	20 mi long run; complete race-day rehearsal	40 mi
Week 16Taper	Rest	4 mi easy run	25 min easy cross-training or mobility	6 mi relaxed run; 2 mi at planned marathon effort	Rest	4 mi easy run	12 mi long run, controlled effort	26 mi
Week 17Taper	Rest	3 mi easy run	Rest or 20 min gentle mobility	4 mi relaxed run + 4 short strides	Rest	3 mi easy run	8 mi long run, conversational effort	18 mi

Week 18 · Race week

Shifted for the race's actual weekday. The first 17 weeks stay unchanged.

8 mi + race

Sun

Rest

Mon

3 mi easy run

Tue

Rest or 15 min gentle mobility

Wed

3 mi easy run + 4 short strides

Thu

Rest

Fri

2 mi shakeout, or rest

Sat

Marathon — 26.2 mi

This free plan is complete, fixed, and ready to use.

It begins at 15 miles per week, peaks at 40, and asks you to manage schedule changes and missed training yourself.

A Stride plan ranks from your running, then dates to race day.

Current mileage, recent longest run, marathon experience, goal, and available days decide which plans rank first.

Build My Plan

How to use this plan for Jack & Jill's Downhill Marathon

The mileage builds your engine. Your long-run route, pacing, fueling, and clothing rehearsals make that fitness specific to this race.

How to train for Jack & Jill's

Training for Jack & Jill's Downhill Marathon is a quad-durability project above everything else. A sustained descent over the final 13 miles will wreck legs that have only ever run flat, and the failure is not cardiovascular. You feel fine and simply cannot hold pace, usually somewhere after mile 20, because eccentric muscle damage has been accumulating since the tunnel.

Build the tolerance on purpose. Starting about eight weeks out, put 3 to 6 miles of gentle continuous downhill into a long run every week or two, at or slightly faster than goal pace, on a grade shallow enough that you are running rather than braking. Six to eight of those sessions before race day is the difference between a fast second half and a limp.

Two more specifics. Run some long runs on packed gravel so your feet and ankles get used to a surface that is firm but not asphalt. And do at least one pre-dawn run wearing the exact light you plan to carry, so you learn how your stride changes when you can only see twenty feet ahead. A 6 a.m. mountain start means you will be running in the dark regardless.

Keep the plan honest. This free schedule contains no speedwork. Apply the course guidance through route choice and race rehearsal without turning easy days into extra workouts. If your goal calls for marathon-pace work, compare it with First Marathon Plus.

Match the terrain

Rehearse race morning

Race day is late July with a start high in the Cascades and a finish well down in the valley, so expect a real temperature swing from start to finish. No verified race-morning temperature norms are available for this course, so plan on a cold dark wait at Hyak and warm running by the closing miles. Train with throwaway layers and a plan for shedding them.

Prepare for the hard part

Miles 20 to 26, where the sustained descent stops feeling free and quads that have not trained downhill start refusing to hold pace.

Check the starting line before you commit.

Beginner-friendly does not mean couch-to-marathon. Week one asks for four runs, 15 total miles, and a six-mile long run.

Fifteen miles in week one is close to the volume you already handle.
You can protect four run days most weeks, including a weekend long run.
Your priority is a steady first-marathon build without speedwork.
You can start around March 20, 2027 without forcing the early weeks.

Jack & Jill's Downhill Marathon questions, answered.

When should I start this 18-week Jack & Jill's Downhill Marathon plan?

The 2027 Jack & Jill's Downhill Marathon is scheduled for July 24, 2027, so the 18-week window opens around March 20, 2027. Weeks one through 17 keep the normal weekly rhythm and Sunday long run; only the final race week shifts to the event's actual weekday. If that date has already passed, do not compress 18 weeks of mileage into a shorter window.

How should I adapt the four-day plan for the Jack & Jill's Downhill Marathon course?

Use some of your Jack & Jill's Downhill Marathon long runs to practice controlled descending on tired legs. Add downhill exposure gradually; the goal is durable quads, not turning every easy run into a hard one. Training for Jack & Jill's Downhill Marathon is a quad-durability project above everything else. A sustained descent over the final 13 miles will wreck legs that have only ever run flat, and the failure is not cardiovascular. You feel fine and simply cannot hold pace, usually somewhere after mile 20, because eccentric muscle damage has been accumulating since the tunnel.

Is four days a week enough to train for the Jack & Jill's Downhill Marathon?

Four run days can be enough when 15 miles in week one is not a sudden jump and you can protect the long run most weeks. This schedule builds to a 40-mile peak and a 20-mile long run. A runner chasing an aggressive time or already supporting more volume may fit a higher-mileage plan better.

Do you need a headlamp for Jack & Jill's Downhill Marathon?

Yes, it is required. Every runner needs a headlamp or a small flashlight for the 2.4-mile Snoqualmie Tunnel, which is unlit. You reach it around mile 13, roughly halfway. After you come out the far side you can keep your light or donate it for future runners, and the race collects them there.

How much does Jack & Jill's Downhill Marathon drop?

The organizers put it at roughly 1,000 feet of net downhill, with about 1,300 feet of sustained descent, on a USATF-certified course. The first half is flat, the tunnel comes near mile 13, and the final 13 miles descend steadily. It is a runnable grade rather than a steep one.

The same four-day schedule, shaped around the course ahead.

Choose your race for its current date, course profile, typical race-morning conditions, and specific long-run guidance.