What should you know about the WAI2K 100km?
Short answer: The WAI2K 100km, run every November from Greytown to Upper Hutt through the Wairarapa and Hutt hill country, front-loads most of its estimated 4,000 m [13,120 ft] of vertical gain [figure from the race organizer] into the first 43 km [27 mi] — the same tough climbing and technical descending the 50km covers. The course has a second act, though: a rolling out-and-back to Cross Creek, then, inside the last 14 km [9 mi], a genuine climb up Mt Climie — likely well into darkness for a large part of the field, on legs that have already covered most of the day's distance and vert.
What kind of course is the WAI2K 100km, really?
For its first 43 km [27 mi], the WAI2K 100km is the WAI2K 50km: Frith Track, Puffer Saddle (widely called the hardest section on course), the Norbett Creek Loop's tough climb and steep technical descent to Rivendell, then Kaitoke Ridge. That's where the bulk of the course's climbing and its most technical downhill running live.
But at Station Drive — the point where the 50km finishes — the 100km keeps going. Runners head onto Goat Rock track and an incline trail down toward Cross Creek, taking in a summit, tunnels, and a swing bridge, before turning around near the 60 km [37 mi] mark and retracing the same ground back to Station Drive around the 83 km [52 mi] mark. It's a long, rolling middle section — a different kind of demand than the front half's steep pitches, and it's where a lot of the day's total time and fatigue quietly accumulates.
Then comes the part that makes this course distinctive: from the finish-line area, the route doesn't finish. It loops the Mangaroa tunnel circuit and climbs Mt Climie — a real, sustained climb — turns around at the top, and descends 6 km [4 mi] to the actual finish. Given the cut-off structure (16.5 hours to reach the aid station 14 km [9 mi] from home) and the fact that a head torch is compulsory gear specifically for the 100km, that climb is happening well after sunset for a large share of the field — especially anyone outside the front of the pack.
Why the placement of that climb matters
Course design usually puts its hardest single feature somewhere the runner still has legs for it — early or mid-race. The WAI2K 100km does the opposite: it saves an actual climb, not a rolling grade, for after 85-plus kilometres [53-plus miles], layered on top of cold, dark, and however much the out-and-back to Cross Creek has already taken out of your legs.
That's a meaningfully different ask than "the race is just long." Climbing late, on fatigued legs, in the dark, is where three separate things stack: the aerobic cost of any sustained climb, the coordination and pacing discipline that gets harder to hold onto after dark, and whatever Durability debt is already owed from the front-loaded climbing and the long middle section. Training that only prepares you for the Puffer Saddle-style climbing — steep, technical, done fresh — doesn't automatically prepare you for climbing well 85-plus kilometres [53-plus miles] in, in a headlamp beam, on legs that have nothing left to give by feel alone.
The training mismatch this creates
It's natural to point WAI2K 100km prep at the parts you can picture clearly: the technical descent into Rivendell, the steep pitches on the way to Puffer Saddle. Good instinct — that's real Climbing and Descending demand, and it deserves dedicated work.
But a build that peaks its climbing-specific training early and treats the back 57 km [35 mi] as "just keep moving" leaves a gap exactly where the WAI2K 100km puts its final test. Durability — the capacity to hold output as fatigue accumulates — isn't built by simulating the whole 100 km [62 mi]. It comes from accumulated long efforts, back-to-back long training days that reach a genuinely tired state, and consistent volume sustained over weeks. That's the same capacity Mt Climie is quietly asking you to still have that late in the day.
Where CourseRecon fits
This is exactly the kind of course-specific shape a generic "100km plan" doesn't account for — a course that front-loads its technical terrain and then holds a real climb in reserve for the dark. CourseRecon reads the WAI2K 100km's actual profile and checks your recent training against it across all four pillars — Aerobic, Climbing, Descending, and Durability — so you can see whether your training has actually prepared you for the part of the course that comes last, not just the part that's easiest to picture.
It won't predict your finish time. What it will show you is which pillar this specific course is most likely to expose, while there's still time to train for it.
➡️ Check your WAI2K 100km readiness: courserecon.app
FAQ
When is the WAI2K 100km? Saturday 21 November, starting 6:00 am at Woodside train station, Greytown, finishing at Tunnel Gully Upper Picnic area in Upper Hutt. A 2-person (plus optional third "Lifesaver" leg) relay option covers the same course.
Does the WAI2K 100km share a course with the 50km? Yes, for the first 43 km [27 mi] — Frith Track, Puffer Saddle, and the Norbett Creek Loop descent are common to both. The 100km then continues with a rolling out-and-back to Cross Creek and a late climb up Mt Climie before finishing.
Why is the final climb on the WAI2K 100km such a big deal? It's placed inside the last 14 km [9 mi], likely well into darkness for a large part of the field, on top of the fatigue already built up from the front-loaded climbing and the long middle section. Climbing well at that point takes a different kind of readiness than climbing well on fresh legs early in the day.
Should I train differently for the WAI2K 100km? The course's shape — front-loaded climbing, then a late climb after dark — is worth knowing before you build a plan, but the plan itself is a job for you and a coach, not something to take from a race preview. CourseRecon can show you which pillar this specific course is most likely to expose given your recent training; what to actually do about it is a coaching conversation.