42km

Boston Marathon BAA – Level 1

Boston Athletic Association

Beginner20 weeks37 mi4 workouts per week
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About the plan

A 20-week plan for anyone taking on their first marathon training four days a week. It is Level 1 of the official schedule that the Boston Athletic Association publishes for Boston Marathon entrants, the entry step of the four the organization offers. Volume goes from 24 miles (39 km) in the first week to 37 miles (60 km) in week 17, with three days of complete rest — the BAA suggests cycling, swimming or strength training on those days, but no running is prescribed. The week has one track session on Tuesday, a threshold or marathon-pace workout on the weekend, and two easy runs. The signature of the method is the sandwich set: a block of repeats at a hard pace followed, without a long rest, by a block of the same size at marathon pace — this is how the BAA teaches the body to hold target pace on tired legs, which is exactly what Boston demands after the Newton hills. The long run goes from 11 to 14 miles (18 to 23 km) and the target-pace workouts grow to 10 continuous miles (16 km). The last two weeks are the taper. Week 20 is the last week of training and ends on Sunday, exactly as the BAA publishes it; the marathon comes the next day, on day 141 of the plan, because Boston is run on Patriots' Day Monday. If your race is on a Sunday, activate the plan by entering the race date: the whole plan shifts by one day and each workout lands in the same spot of the official schedule again. All paces come from your times in the magic calculator; adjust the reference race time in your profile before starting so that threshold, interval and race paces come out calibrated.

The plan in numbers

Duration
20 weeks
Runs per week
4
Weekly volume
24 mi → 37 mi · 12 min
Longest run
17 mi

Week 1 starts at 24 mi and volume builds to 37 mi · 12 min in week 17, the heaviest of the plan.

A typical week has 4 runs, and the longest session reaches 17 mi (Marathon, week 17).

Over the final 4 weeks volume drops from 37 mi · 12 min to 16 mi · 7 min so you arrive at the race rested.

Race day (26 mi) falls on Monday of week 21, with no runs earlier that week.

Key workouts

The quality sessions that come up most in this plan:

  • Interval16 sessions across 15 weeks
  • Marathon12 sessions across 12 weeks
  • Threshold10 sessions across 9 weeks
  • Long4 sessions across 4 weeks

Who it's for

Beginner level. To start safely you should already be running about 24 mi per week and be comfortable with a 6.5 mi session — that is what week 1 asks for.

Week 1 — workout preview

24 mi this week

MonDay 1
Rest
TueDay 2
Easy

5.5 mi

WedDay 3
Rest
ThuDay 4
Easy

6.5 mi

FriDay 5
Rest
SatDay 6
Easy

5.5 mi

SunDay 7
Easy

6.5 mi

Week 17 — the heaviest of the plan

37 mi · 12 min this week

MonDay 113
Rest
TueDay 114
Threshold

8 mi · 12 min

WedDay 115
Rest
ThuDay 116
Easy

6 mi

FriDay 117
Threshold

7 mi

SatDay 118
Rest
SunDay 119
Marathon

17 mi

Plan Structure

21 weeks · 79 workouts · 62 rest days

W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
W14
W15
W16
W17
W18
W19
W20
W21
Easy
Interval
Marathon
Threshold
Long
Repetition
Rest

See the full plan

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