Running Plan Review Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week
By Daniels' Running Formula — Jack Daniels Requires purchase Visit plan website
Plan at a Glance
This is the entry-level tier of Jack Daniels' Two Quality marathon program. It is built for runners holding 25 to 40 miles per week who want structured marathon preparation without spreading hard work across five or six days. Those two hard sessions carry the entire training stimulus. The rest of the week is easy running, as much or as little as your schedule allows.
You will spend the first four weeks building a threshold and long-run base, then shift into VO2 max intervals and marathon-pace blocks that grow steadily through week 16. The Q sessions rotate through five workout formats. Threshold cruise intervals and VO2 max repeats cover the fast end. Marathon-pace runs, mixed-intensity combinations, and long runs up to 150 minutes carry the rest. By the final build weeks, your longest marathon-pace session asks for 14 miles of race effort split by a single mile of recovery.
Every pace on the schedule is prescribed by letter: E (easy), M (marathon), T (threshold), I (interval), R (repetition). The actual speeds come from the VDOT tables in chapter 5 of Daniels' Running Formula. VDOT is a race-derived fitness number that converts your most recent finish time into five training paces. As race times improve, the paces adjust upward automatically.
Prerequisites: you should be running at least 25 miles per week comfortably across four or five days, with a long run near 60 minutes. You will need a copy of Daniels' Running Formula for pace conversion. No strength work appears on the calendar, and no recovery weeks interrupt the 18-week build. You are responsible for organizing supplemental training and managing your own recovery.
Below is Buena Vida's full review. We score every plan against our detailed, 31-point benchmark. Each measure is traced back to peer-reviewed sports-science research and proven coaching best practices.
Workouts
Workout names and distances only. Coaching prose belongs to the plan’s author.
Similar plans
Our Review
You have held 25 to 40 miles a week for several months, and a marathon is 18 weeks out. You want real hard days without spreading intensity across the whole week. This is the most approachable tier of Daniels' 2Q marathon build. Two hard sessions carry the training, and the rest of the week is easy running you size to your schedule. It earns a strong score for what it does on the page, with a few honest gaps you will fill yourself.
The session that defines this plan lands in week 16. Q1 stacks two marathon-pace blocks inside easy miles. You run 1 mile easy, 8 miles at marathon pace, and 1 mile easy. Then 6 more at marathon pace and a closing 1 mile easy. That is 17 miles two weeks before the start line, 14 of them at race effort. Run as 40 miles that week, it is more than 40 percent of your volume in one day. Hold the second 6-mile block at pace and you have your answer about whether this base is enough. Fade in it, and the plan has told you something useful while there is still time to act on it.
The build supports that test well. Volume climbs gently, no week spikes hard over the three before it, and the two hard days stay two easy days apart from start to finish. The gaps are the ones this tier leaves to you. There is no scheduled cutback week across the 18 weeks, no strength on the calendar, and no rule for a sore knee or a lost week. The pace letters also need Daniels' Running Formula on the desk. The VDOT tables in chapter 5 are where E, M, T, I, and R turn into actual paces.
Best for a runner who has covered 25 to 40 easy miles a week for a few months. You want a marathon build that keeps the hard work to two days, and you are willing to self-organize strength and recovery. If you want cutback weeks and an injury protocol written into the schedule, choose a plan that programs them. If you want every workout to carry its own pace numbers on the page, this one will feel half-finished without the book beside it.
-
Structure
Does the plan build you up smartly?
Mostly. The 18-week arc moves from threshold foundations, where you hold a comfortably hard pace, through interval work and into sustained marathon-pace blocks. The two hard sessions rotate through five formats, so no two weeks repeat the same pairing, and hard-easy spacing is disciplined, with at least two easy days between the harder efforts. The one gap is a scheduled lighter week. Your legs absorb a long stretch of building load before the taper finally arrives, with no built-in pause along the way.
-
Prevention
Does the plan protect you from injury?
Partly. The everyday mechanics are sound. Every hard session opens with 30 to 45 minutes of easy running, so you never meet threshold or interval pace cold, and the two hard days sit at least two easy days apart. The week-to-week load also stays controlled, with no single week spiking sharply over the three before it. What is missing sits around the edges. There is no planned cutback week, no strength work anywhere on the calendar, and no rule for what to do when something starts to ache.
-
Flexibility
What happens when you miss a day?
You get one real lever and not much else. Because you choose how many easy days to run, you can set your weekly volume anywhere from 25 to 40 miles, which lets the plan bend to a busy stretch. Past that, the schedule assumes you finish every week intact. Nothing covers a missed session, a sick week, or how to rebuild after one falls apart. Your paces do adjust on their own through Daniels' VDOT, a fitness number drawn from your recent race times, but the calendar itself holds its shape no matter what your week looked like.
-
Readiness
Will the plan deliver race-day fitness?
Yes, this is the plan's strongest dimension. Marathon-pace work grows from 6 miles in week 9 to a 14-mile race-effort block by week 16, and long runs stretch from 60 minutes out to 150. By the final weeks you will have held race effort long enough to take the guesswork out of the first 20 miles. The taper then trims volume across the last two weeks while keeping one threshold session sharp, so you reach the start line rested without going flat.
-
Variety
Are the workouts varied enough?
Somewhat. Six run types appear across the cycle: easy, long, threshold, interval, marathon-pace, and shake-out. The threshold work alone rotates through 1-mile repeats, 2-mile cruise intervals, and 3-mile sustained blocks, and interval days mix 3-minute and 4-minute VO2 max bouts (your hardest sustainable effort) with 1-minute reps at mile speed. The thing absent is the supplementary side. No strength, strides, or drills land anywhere on the schedule, so that part of the work is left for you to build.
Plan Strengths
- Marathon-pace blocks grow from 6 miles in week 9 to a 14-mile race-effort run by week 16, so race pace sits in your legs well before the start line.
- Each hard session buries 30 to 45 minutes of easy running ahead of the fast work. You reach threshold and interval pace already warm.
- Week-to-week volume climbs gently, with no single week jumping more than about 12 percent over the prior three, so your legs are never shocked.
- Five hard-session formats rotate across the build. They train lactate clearance, VO2 max, and mile-speed turnover from different angles.
- VDOT recalibrates all five training paces as your fitness improves, so the numbers you run keep pace with the body you are building.
Weaknesses & gaps
- No cutback or recovery week appears in the 18-week build. The lighter weeks happen by workout rotation, not by design.
- Strength training never reaches your calendar, so you organize your own routine around the two hard days and your easy miles.
- A sore knee mid-build or a week lost to illness leaves you without any return-to-training rule to follow.
- The pace letters resolve to real speeds only with the VDOT tables in hand. Without the book, T and M become feel-based guesses.
- The plan never names which session to keep when a week gets crowded, so the cut-order call is yours to make.
What this plan does not give you
The plan runs on pace letters (E, M, T, I, R) that only resolve into actual speeds when you look them up. The VDOT tables in chapter 5 of Daniels' Running Formula hold those numbers. Without the book open beside you, each workout reads as a structure without numbers. Strength training is recommended in chapter 15 but never placed on the schedule, so you will need to organize your own routine on two of the easy days. No recovery or cutback week appears across the 18-week build, which means 15 straight weeks of increasing load before the taper begins. If you develop a sore knee or miss a week to illness mid-build, no guidance tells you how to adjust or when to resume. Plan those decisions in advance, because the schedule assumes full adherence from start to finish.
What the science supports
Periodization beats constant-load training
The 18 weeks move through distinct training stages rather than repeating the same workouts throughout. Weeks 1 through 4 focus on threshold runs (a sustained comfortably-hard effort, roughly your current 1-hour race pace) and building long-run duration. Weeks 5 through 8 introduce faster interval sessions at about 5K race effort. Weeks 9 through 16 shift the emphasis to marathon-pace blocks that grow longer each cycle. Splitting training into stages consistently outperforms holding the same mix week after week.
Bradbury et al. 2020; Tønnessen et al. 2014; Casado et al. 2022
Keep easy days easy, hard days hard
Only two days each week carry hard work. The Q1 and Q2 sessions sit on days 1 and 4 of the weekly cycle, separated by at least two easy days. The remaining five days are relaxed, conversational running that you scale to fit your schedule. Research consistently finds that keeping easy days genuinely easy and clustering hard efforts with real recovery between them works better. The payoff is greater fitness gains and fewer injuries than spreading moderate effort across every run.
Stöggl & Sperlich 2014; Casado et al. 2022; Kenneally et al. 2017
Long runs are essential for marathon
The Q1 long run builds from 60 minutes in week 1 to a peak of 150 minutes in week 15, just before the taper. That progression trains the body to hold steady over hours of running, building the fuel-burning and connective-tissue endurance that shorter sessions cannot replicate. For the marathon specifically, research identifies this kind of prolonged, easy-effort running as the training element most responsible for holding pace through the final miles on race day.
Toresdahl et al. 2021; Jones & Kirby 2025; Casado et al. 2019
Varied intensity beats steady moderate pace
Q sessions rotate through five distinct formats across the cycle. You will see threshold cruise intervals at comfortably-hard effort and VO2 max repeats at roughly 5K race pace. Repetition-pace work runs at about mile race speed. Sustained marathon-pace blocks and mixed sessions that combine two intensities back to back round out the set. Rotating between formats trains different energy systems each week rather than grinding a single moderate effort, which research links to larger gains in both endurance and speed.
Stöggl & Sperlich 2014; Rosenblat et al. 2019; Casado et al. 2022
Race-pace specificity hinges on physiology
Marathon-pace blocks start at 6 miles in week 9 and grow to a 14-mile race-effort run by week 16, two weeks before the race. Several sessions sandwich the marathon-pace segment between threshold-effort miles, so you practice shifting from a harder gear down into race rhythm. For an intermediate runner at this mileage tier, marathon pace sits near the lactate threshold. Sustained practice at race effort trains both pacing skill and the specific energy system race day will demand.
Pierce et al. 1990; Hewson & Hopkins 1996; Jones et al. 2021
Train better with Buena Vida
Buena Vida Run Club members get access to a catalog of 250 training plans as part of their membership. Training with Buena Vida offers detailed daily workout notes, integrated nutrition, live voice coaching, weight loss plans, and easy calendar management for life's hiccups.
Try it FREE for 7 days!
Frequently asked questions
- Is Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week good for beginners?
- No. Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week is built for intermediate-level runners. A true beginner should start with a lower-mileage plan.
- How many days per week does Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week require?
- The plan runs on a schedule of multiple weekly runs. See the at-a-glance strip for the exact count.
- Does Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week include a taper?
- Yes, the plan includes a taper into race week.
- What is the rubric grade for Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week?
- Daniels 2Q Marathon Training Plan, Up to 40 Miles per Week grades C on the Buena Vida rubric.