Flat vs Hilly Course Training
If your goal race is flat, most of your training can stay simple: pace-based runs on whatever terrain is convenient. If your goal race has real elevation gain, your plan needs deliberate hill exposure, not just more mileage, because flat-ground fitness doesn't fully transfer to climbing and descending under race fatigue.
Training for a flat goal race
For a flat course, terrain matters less than consistency and pace discipline. Focus your training on hitting goal race pace comfortably in your key workouts, and don't worry about seeking out hills for their own sake. If your usual training routes happen to have some elevation, that's a bonus for general strength, not a requirement.
Training for a hilly goal race
For a hilly course, work hill running into your plan directly. This usually means three things: dedicated hill repeats once a week to build climbing strength, at least one weekly run on rolling or hilly terrain to practise sustained effort changes, and specific downhill practice, since downhill running uses different muscles than flat running and can cause real soreness if it's unfamiliar on race day. Read more on how elevation gain affects race time for why this matters as much as it does.
Practical adjustments to make
| Element | Flat goal race | Hilly goal race |
|---|---|---|
| Weekly hill work | Optional | 1 dedicated session recommended |
| Long run terrain | Flexible | Include rolling or hilly sections |
| Downhill practice | Not necessary | Important, builds quad resilience |
| Goal pace strategy | Fairly even effort throughout | Adjust effort up on climbs, control on descents |
Why downhill practice specifically matters
Runners training exclusively on flat terrain often underestimate downhill sections, since they feel easy in the moment but load the quads eccentrically in a way flat running never does. Without any practice, this commonly shows up as significant soreness in the days after a hilly race, sometimes affecting the ability to train normally for a week or more. A few downhill repeats in the weeks before race day meaningfully reduces this.
Adjusting race-day strategy, not just training
On a hilly course, effort-based pacing tends to work better than strict pace-based pacing. Let your pace slow slightly on climbs rather than forcing your goal pace uphill, and use gentle descents to recover effort rather than sprinting them. If you're new to reading your own effort this way, understanding race splits and pacing is a useful companion piece before race day.
Compare upcoming races by city and terrain, and pick one that fits the training you've actually done.
Browse eventsMy honest take, based on the mix of races on the platform, is that a good number of runners register for a hilly goal race months in advance and then train almost entirely on flat routes near home, sometimes simply because that's what's available locally. That's a reasonable constraint, not a mistake, but it's worth being aware of the gap it creates so it doesn't come as a surprise on race day. Even a handful of deliberate hill sessions in the final weeks makes a real difference.
Frequently asked questions
Do I need to train on hills if my goal race is flat?
No, it isn't necessary, though occasional hill work still has general strength benefits. Prioritise pace-specific training for a flat goal race instead.
How many hill sessions per week should I do for a hilly race?
One dedicated hill session per week is generally enough for recreational runners, alongside a long run that includes some rolling or hilly terrain where possible.
Why does downhill running cause so much soreness?
Downhill running relies on eccentric muscle contractions in the quads, which cause more microscopic muscle damage than flat or uphill running, leading to noticeable soreness if it's unfamiliar.
What if I don't have access to hills where I train?
A treadmill incline, stadium stairs or even a single repeated slope near you can substitute reasonably well. Consistency matters more than finding a perfect hill.