2027 Boston Marathon: your plan set for Monday, April 19, ready on your Garmin
Race day is Monday, April 19, 2027, Patriots' Day, and training starts on Monday, February 1. In two minutes, Running Workout sets the 12-week plan to that date; then your AI assistant sends each week's workouts to your watch, hill sessions included if you ask for them.
Last updated: October 27, 2026
Boston Marathon
Mon, April 19, 2027
161 days
to race day
- Distance
- 26.2 mi
- Edition
- 131st
- Entry
- Qualifying time
- Course
- Hopkinton to Boston
Plan starts: Mon, February 1 (12 weeks)
Train for April 19Free to start · official Garmin connection
Try it now
Ask your assistant
Once your Garmin is connected, paste one of these into Claude or ChatGPT:
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« Build my 12 weeks of training for the Boston Marathon on Monday, April 19, 2027, with 5 runs a week. »
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« Send a hill workout to my watch for Thursday: 8 × 2 min uphill, jogging back down. »
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« I'm aiming for 3:20 in Boston: what pace per mile should I start at on the Hopkinton downhill to save my legs for Heartbreak Hill? »
Free to start · 4 workouts a month sent to your watch
Your training, timed for April 19
The plan lasts 12 weeks, starting on Mon, February 1. With more time, it can start on January 4 with 4 lead-in weeks.
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Weeks 1–3
Base
Feb 1 → Feb 21
Settle volume, wake threshold up
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Weeks 4–7
Development
Feb 22 → Mar 21
Marathon pace comes in, long runs get longer
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Weeks 8–10
Specific
Mar 22 → Apr 11
Long blocks at marathon pace, 2-hour-plus runs
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Weeks 11–12
Taper
Apr 12 → Apr 19
Two weeks to arrive fresh
A course that wrecks the quads
From Hopkinton to Boston the route drops about 460 feet, most of it in the first 16 miles. Then come the four Newton hills, including Heartbreak Hill, between miles 16 and 21. The early descent wears the quads; the hills arrive when they are already damaged.
The Running Workout marathon plan does not include hills or descents by default: ask your assistant to add 3-minute uphill repeats, which it builds and sends to your watch, and run some long runs on a downhill route to get your thighs used to eccentric work.
Qualifying and the calendar
The qualifying time depends on age and sex (for 2027, 2:55 for men and 3:25 for women aged 18 to 34), and meeting it is not enough: for 2027, the fastest were accepted down to 5:17 under their standard, then about 1,000 slower qualifiers were drawn at random. So aim for a real margin, in a marathon run within the qualifying window, before the September registration week.
Race on Monday, April 19, 2027: the 12-week plan starts on Monday, February 1, and the longer 16-week version on Monday, January 4. Each week, the AI coach reviews your actual sessions from Garmin before sending the next ones.
Pacing: restraint on the descent, patience in Newton
Boston's trap is known to everyone and yet repeated every year: going out too fast on the descent. A simple rule: target pace plus 25 seconds per mile over the first 5 miles, target pace afterwards, plus 30 seconds per mile on each Newton hill without making it up.
- Long runs with descents, from week 6.
- 3-minute hill repeats, last eight weeks.
- Hill rule: + 30 s/mi, no making it up on the descents.
After Heartbreak Hill there are about 5 miles of descent to Boylston Street. If you held back early, that is where you overtake.
Frequently asked questions
When is the 2027 Boston Marathon?
Monday, April 19, 2027, Patriots' Day, for the 131st running.
What time do you need to qualify?
It depends on age and sex, and the real cut-off is often lower than the official standard. Aim for a few minutes of margin from a fast autumn marathon.
Why is Heartbreak Hill so feared?
It is neither long nor steep, but it comes at mile 20, after 16 miles of mostly downhill running that have worn the quads. It is the placement, not the gradient.
Is Running Workout free?
Free to start: Garmin connection, plans, reading your activities and 4 workouts a month sent to your watch. Running Workout Pro (€4.90 a month or €35 a year, no commitment) removes the limit.
Boston Marathon
April 19 is 161 days away.
The plan is set to that date; your assistant does the rest, week after week.