How Elevation Gain Affects Race Time
Elevation gain is the total climbing a course involves, usually listed in metres, and it changes effective effort in a way flat-course pace predictions don't account for. Two races of the same distance can feel completely different depending on how much climbing sits between the start and finish, and it's worth understanding before you pick a goal time.
Why hills slow you down more than they should, on paper
Running uphill costs more energy per kilometre than running on flat ground, since you're working against gravity on top of forward motion. What surprises a lot of runners is that downhill doesn't fully return the favour: the eccentric muscle loading of running downhill, especially on tired legs late in a race, has its own cost, so a hilly out-and-back course rarely balances out to the same effort as a flat one, even if total ascent and descent are roughly equal.
Roughly estimating the time impact
There's no single formula that works for every runner, since it depends on hill steepness, your downhill running efficiency and how much climbing is packed into a short stretch versus spread out. As a rough starting point, many recreational runners see their overall pace slow by somewhere in the range of a few seconds to over a minute per kilometre on a genuinely hilly course compared to a flat one at the same effort level. Treat this as a planning buffer, not a precise prediction, and adjust your goal time on a hilly course accordingly rather than using a flat-course pace target.
| Course profile | What to expect |
|---|---|
| Flat (minimal elevation change) | Pace closest to flat-course training pace |
| Rolling (frequent small hills) | Moderate slowdown, effort varies km to km |
| Hilly (sustained climbs) | Noticeable slowdown, especially on long climbs late in the race |
What to check before you register
Most event pages list an elevation profile or total elevation gain figure. If it isn't listed, ask the organiser directly, particularly if you're chasing a specific finish time or a qualifying time for another race. A course being described as scenic is sometimes a polite way of saying hilly, so it's worth checking the actual numbers rather than the marketing copy.
Training for a hilly race
If your goal race has real elevation gain, training on flat ground exclusively leaves a gap that shows up on race day, usually in the form of unfamiliar quad soreness from downhill sections or a pace collapse on a climb you hadn't prepared for. See flat vs hilly course training for how to adjust your training plan specifically for a hilly goal race.
Browse upcoming races and compare course details, including elevation, before you register.
Browse eventsMy honest observation, from the organiser side of event listings, is that elevation gain is one of the least consistently documented details on race pages, some organisers list it clearly, plenty don't mention it at all. Based on what we see, this seems to catch out runners who pick a race purely on distance and city without checking the course profile. If a race is new to you and hills genuinely worry you, it's worth a message to the organiser directly rather than assuming flat.
Frequently asked questions
Does downhill running make up for uphill effort?
Not fully. Downhill running has its own physical cost, particularly on tired legs, so a hilly course generally still runs slower overall than a flat one at the same effort.
How much slower should I expect to run on a hilly course?
It varies by runner and course, but a noticeable slowdown compared to your flat-course pace is normal on a genuinely hilly route. Treat any specific number as a rough planning estimate.
Where can I find a course's elevation profile?
Check the event page first. If it isn't listed, contact the organiser directly, especially if you're targeting a specific finish time.
Should I still race a hilly course if I've only trained on flat ground?
You can, but expect a slower time than your flat-course pace would suggest, and be prepared for more muscle soreness afterward, particularly in the days following the race.