Detroit Free Press Marathon 3:45 pace chart
A 3:45:00 finish at the Detroit Free Press Marathon averages 8:35 per mile (5:20 per kilometre) — a fast recreational time, roughly the top quintile of a big-city field. Run at even effort rather than even pace, the easiest mile comes in around 7:55/mi and the hardest around 13:51/mi — about 356 seconds between the two extremes. Holding an identical number on every mile of a course with this profile means running the climbs too hard and the descents too easy. Held at even effort, halfway comes up at 1:56:45 — a 8:30 negative split, because the harder half comes first. The hardest mile on the course sits near kilometre 12; at this goal time it should take 9:56/mi, and giving it that time is the difference between finishing Detroit on plan and unravelling in the last hour.
Mile-by-mile targets for 3:45:00
Grade-adjusted splits computed from the Detroit Free Press Marathon elevation profile with the Minetti gradient-cost model, scaled so the full course adds up to 3:45:00. Uphill sections get more time, downhills less, at one constant effort throughout.
| Mile | Target /mi | Target /km | Elev Δ | Elapsed |
|---|---|---|---|---|
| 1 | 8:10 | 5:04 | -12 ft (-4 m) | 8:10 |
| 2 | 8:17 | 5:09 | +2 ft (+1 m) | 16:27 |
| 3 | 8:13 | 5:06 | -7 ft (-2 m) | 24:39 |
| 4 | 9:23 | 5:50 | -585 ft (-178 m) | 34:02 |
| 5 | 8:16 | 5:08 | 0 ft (0 m) | 42:18 |
| 6 | 8:16 | 5:08 | 0 ft (0 m) | 50:34 |
| 7 | 8:16 | 5:08 | 0 ft (0 m) | 58:50 |
| 8 | 9:56 | 6:10 | +89 ft (+27 m) | 1:08:45 |
| 9 | 13:51 | 8:36 | +506 ft (+154 m) | 1:22:36 |
| 10 | 8:22 | 5:12 | +11 ft (+3 m) | 1:30:58 |
| 11 | 8:20 | 5:11 | +8 ft (+3 m) | 1:39:19 |
| 12 | 8:19 | 5:10 | +6 ft (+2 m) | 1:47:38 |
| 13 | 8:12 | 5:06 | -7 ft (-2 m) | 1:55:50 |
| 14 | 8:21 | 5:11 | +10 ft (+3 m) | 2:04:11 |
| 15 | 8:14 | 5:07 | -4 ft (-1 m) | 2:12:25 |
| 16 | 8:12 | 5:06 | -7 ft (-2 m) | 2:20:37 |
| 17 | 8:21 | 5:12 | +10 ft (+3 m) | 2:28:59 |
| 18 | 8:19 | 5:10 | +5 ft (+2 m) | 2:37:17 |
| 19 | 7:55 | 4:55 | -41 ft (-13 m) | 2:45:13 |
| 20 | 8:22 | 5:12 | +12 ft (+4 m) | 2:53:35 |
| 21 | 8:16 | 5:08 | +1 ft (0 m) | 3:01:51 |
| 22 | 8:18 | 5:10 | +5 ft (+1 m) | 3:10:10 |
| 23 | 8:15 | 5:07 | -3 ft (-1 m) | 3:18:24 |
| 24 | 8:15 | 5:07 | -2 ft (-1 m) | 3:26:39 |
| 25 | 8:16 | 5:09 | +1 ft (0 m) | 3:34:56 |
| 26 | 8:14 | 5:07 | -3 ft (-1 m) | 3:43:10 |
| 26.2 | 8:23 | 5:12 | +3 ft (+1 m) | 3:45:00 |
Frequently asked questions
What pace is a 3:45 marathon?
A 3:45:00 marathon is 8:35 per mile or 5:20 per kilometre held for the full 26.2 miles (42.195 km). On the Detroit Free Press Marathon specifically, the elevation profile means even effort produces uneven splits — the table on this page gives the target for every mile.
What should my halfway split be for a 3:45 at the Detroit Free Press Marathon?
1:56:45. That is the grade-adjusted halfway target for this course, not simply half of 3:45:00 — it accounts for where the climbing sits. Reaching the half meaningfully faster than this on this course usually means you have spent the effort you need for the closing miles.
Should I run even splits at the Detroit Free Press Marathon?
Even effort at a 3:45 goal produces splits between 7:55 and 13:51 per mile — about 356 seconds between the easiest and hardest one. Grade-adjusted pacing gives back time on the descents and spends it on the climbs, which is what running an even physiological effort actually looks like on a course with this profile.
How are these Detroit Free Press Marathon splits calculated?
Each mile is weighted by its gradient using the Minetti et al. (2002) cost-of-running polynomial, which measures the metabolic cost of running at grades from −45% to +45%. The total is then scaled so the whole course adds up to 3:45:00. Uphill sections get more time and downhill sections less, at a constant effort throughout.
Is 3:45 a realistic marathon goal?
3:45 is a fast recreational time, roughly the top quintile of a big-city field. Whether it is realistic for you depends on your recent race results and weekly volume rather than on the number itself — the race-time predictor on this site will convert a recent 5K, 10K or half-marathon result into a marathon estimate using the Riegel power-law model.