Four hours for the marathon and two hours for the half marathon are two of the most-searched goal times in the sport, and that's not a coincidence — they sit at almost exactly the same fitness level. A runner who can hold marathon pace for 4:00:00 can, on a good day, hold that same pace for a half marathon in almost exactly 2:00:00. The two goals are really one goal, run over two different distances.
The pace both goals share
Both benchmarks come down to the same number: about 9:10 per mile. Below it, you're under both cutoffs. A few seconds a mile faster buys real insurance against a slow first mile, a hill, or a warm afternoon.
| Goal | Pace per mile | What it buys you |
|---|---|---|
| 4:00:00 marathon | 9:10/mi | The exact cutoff — no room for a slow mile |
| 3:58:00 marathon | 9:05/mi | A small cushion |
| 3:55:00 marathon | 8:58/mi | A comfortable buffer |
| 2:00:00 half marathon | 9:10/mi | The exact cutoff — no room for a slow mile |
| 1:58:00 half marathon | 9:00/mi | A small cushion |
| 1:55:00 half marathon | 8:47/mi | A comfortable buffer |
Why the buffer matters
Training to the exact cutoff pace is training with zero margin for anything race day throws at you. A crowded start that costs you 20 seconds in the first mile, a rolling hill mid-course, a GPS watch reading long around a tight turn, warmer-than-forecast weather — any one of these can turn an exact 4:00:00 fitness level into a 4:03 finish. Training for a few seconds per mile faster than the cutoff is the simplest way to absorb a bad moment without losing the goal entirely.
Pacing it: a mild negative split
Rather than aiming for a dead-even pace from the gun, most runners who reliably hit these goals run the first half a little slower than the second — a negative split. It absorbs the adrenaline-fueled urge to go out too fast, and it means the pace you're holding at the finish is one you've already proven you can run, not one you're hoping for.
| Goal | First half | Second half |
|---|---|---|
| 3:58:00 marathon | 2:00:30 (9:12/mi) | 1:57:30 (8:58/mi) |
| 1:58:00 half marathon | 1:00:00 (9:10/mi) | 0:58:00 (8:51/mi) |
Training to hold the pace
Fitness for this goal comes from the same structured build described in RaceRove's training plans by distance guide, with goal pace worked in deliberately rather than left to race day to discover.
- Goal-pace long runs. In the final six to eight weeks, run the middle miles of a long run — not the whole thing — at goal pace, so your legs know what it feels like well before race day.
- Tempo runs. A sustained effort at a pace close to (slightly faster than) goal pace, held for 20–40 minutes, builds the specific fitness this goal needs.
- A dress rehearsal. A tune-up race at a shorter distance a few weeks out — a 10K or half marathon at goal-adjacent effort — tells you more about race-day readiness than any training run can.
- Easy days that stay easy. The goal-pace work only pays off if the days around it are genuinely easy; running everything at a moderate effort leaves nothing in reserve for the sessions that matter.
Common ways this goal slips away
- Starting too fast. Covered above, and still the most common reason a 4:00:00-fitness runner finishes in 4:06.
- Ignoring the course profile. A goal pace calculated for a flat course doesn't survive a hilly one unmodified — slow down on climbs and let the pace even out on descents rather than fighting for an even split mile by mile.
- Never rehearsing the pace. A goal that's only ever existed as a number on a pace calculator is a guess, not a plan.
- Treating the taper as optional. Fitness built over months of training doesn't show up on race day if the legs are still carrying fatigue from three weeks of hard running with no let-up.
Picking the right course
A flat, certified course with a big enough field to draw a pace group makes this goal meaningfully easier to execute than a small, hilly one — a pace group running exactly the split you need removes most of the guesswork. Search marathons and half marathons and filter by course profile, or start from the full list of states if you're willing to travel for the right course.
Big-city races tend to have the deepest pace-group support: marathons in Illinois, California and New York, or the equivalent half marathon listings for Illinois and New York, are all reasonable starting points.
A simple plan
- Pick your version of the goal — the exact cutoff, or one of the cushioned targets above — based on how confident you are going in.
- Find its pace in the table and treat that number, not the finish time, as the actual target.
- Build goal-pace segments into long runs and tempo sessions over the final two months.
- Plan a mild negative split rather than an even one, and resist banking time in the first miles.
- Choose a flat, certified course with a field big enough to run alongside, and taper properly in the final weeks.