S 25 Berlin: Course, Elevation & Route Profile

Course & Elevation

The course is a loop of just under 25 kilometres, starting on Olympischer Platz in front of the stadium and finishing inside it. Because the motorway bridge on the A100 city ring is still closed, the S 25 has not reached central Berlin for several years; instead the 25-kilometre route leaves the Olympiapark towards the Grunewald forest and only returns late.

Until roughly kilometre 14 the profile stays in a narrow band around 55 to 65 metres, and about half the course is completely level. Then comes the only sustained climb: a good kilometre averaging four percent for 44 metres of gain, topping out at the highest point of the course near 87 metres at kilometre 16. The route then descends over several kilometres to around 40 metres before a short, much steeper ramp at kilometre 21: 330 metres averaging 6.6 percent with pitches near ten percent. Total gain is around 210 metres.

So this is less city than park and forest: avenues inside the Olympic grounds, forest tracks and park roads in the Grunewald, framed by the architecture of the old Reichssportfeld. The event regularly draws more than 10,000 participants, a running festival runs alongside it on the stadium grounds, and every distance ends with a lap on the blue track.

Pacing Strategy

The first 14 kilometres give you no feedback on your pace, because they are simply flat. That is exactly this course's trap: you can run two minutes too fast here without noticing, and only pay for it from kilometre 15 onwards. So commit the first half to a pace you could still hold uphill on tired legs, instead of letting the level ground carry you.

The race is decided between kilometre 15 and 21. The long four-percent climb is no mountain, but at this race distance it breaks your rhythm immediately; run it at even effort rather than even pace, and treat the several kilometres of descent that follow as active recovery without burning your quads on the steeper part. The short ramp at kilometre 21 then arrives on already loaded legs and is the point where your first-half discipline either pays off or bites.

The last three kilometres run back to the stadium without any gradient. Factor in that April in Berlin can deliver anything from frost to early-summer warmth, and that the aid stations in the forest are further apart than at a classic city race, so drink early.

Training plan for S 25 Berlin: 12-week build

25 kilometres means roughly 1:20 to 2:40 hours of racing depending on your level, clearly longer than a half marathon and already in the range where carbohydrate supply matters.

The demand is steady and aerobic for most of the way: about half the course is level, and steep sections together account for less than two percent of it. Only the block between kilometre 15 and 21 asks for something else, namely climbing and then descending at length on already fatigued muscles.

Set two priorities in your build. First, long runs of 25 to 30 kilometres with the closing kilometres at target race pace, so that this unusual distance between half marathon and marathon becomes familiar. Second, rolling terrain at the end of those long runs: a one-kilometre climb at four percent and a short six to seven percent ramp can be reproduced almost anywhere, and the long descent that follows trains the eccentric loading this course asks for from kilometre 17.

Plan for the conditions too. A ten o'clock start in April usually means cool, windy air in Berlin in the morning and noticeably milder air in the forest during the second half of the race. Test clothing and fuelling in sessions at the same time of day, and rehearse the closing stadium lap mentally, because finishing on the track feels different from every metre of tarmac before it.