2026 Whanganui Marathon - Dec 6

2026 Whanganui Marathon - Dec 6 Countdown

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Race Information

Race2026 Whanganui Marathon - Dec 6
CityWhanganui
Date2026-12-06 at 06:00
Field Size~120 runners
Time Limit7 hours
TimezonePacific/Auckland
Official SiteWhanganui Harrier Club
RegistrationRegister · 70 NZD

Race Day Weather

Average Temperature17°C / 63°F
Humidity70%
Wind15 km/h
Rain Chance35%
Typical ConditionsEarly NZ summer. The 6am start at Kowhai Park is usually mild at 12–15°C, climbing into the high teens or low 20s by midday with ~70% humidity. December can turn genuinely hot and humid, and Tasman Sea breezes (avg ~15 km/h) sweep the riverside flats.

What to Prepare: Dress for a cool start but expect heat by your final laps; the four-lap layout lets you stash a singlet and shed layers. Carry your own fluids between aid stations on a warm day and check your Weather Score before race morning.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 15 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Course Profile

Course TypeFlat 4-lap loop (same start/finish at Kowhai Park)
Elevation Gain30m
TerrainSealed road edge, footpaths, grass and walking tracks along the scenic Whanganui River, past the city's three bridges.
ProfileAlmost pancake-flat — about 30 m total elevation gain, a genuine PB and Boston-qualifying course.

Prepare for 2026 Whanganui Marathon - Dec 6

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Frequently Asked Questions

When and where is the 2026 Whanganui 3 Bridges Marathon?

The marathon is on Sunday 6 December 2026, starting at 6am from Kowhai Park in Whanganui. The full marathon is a 4-lap course (the half is 2 laps, the quarter 1 lap) along the Whanganui River, with all distances starting and finishing at Kowhai Park.

Is the Whanganui marathon a good course for a PB or a Boston Qualifier?

Yes. The marathon and half courses are IAAF/AIMS certified and almost completely flat (about 30 m of total gain), which makes it one of New Zealand's better flat PB courses and valid for Boston qualifying times. Check your target with the Boston Qualifying calculator, then plan even laps with the Pace Calculator.

How do I enter and what does it cost?

Entries open early June 2026 at the official site, with standard entry running until the field closes and a late-entry surcharge after the cut-off. Recent fees were around NZD 70 early and NZD 90 late for the marathon (2026 prices to be confirmed). Most events sell out, and the half and 5km commonly fill first, so enter early.

What is the cutoff time?

The course closes at 1pm, giving a generous 7-hour limit from the 6am start. The event is explicitly run/walk friendly, so it suits first-timers and walkers as well as PB-chasers.

Why is the 2026 edition special?

The 2026 race hosts the New Zealand Marathon Championships (marathon distance only), run by the Whanganui Harrier Club in its 23rd-plus year. That national-champs status typically draws a stronger field and adds a competitive edge to an otherwise community-friendly event.

What is the weather like in early December?

It is early NZ summer. Expect a mild start near 12–15°C warming to the high teens or low 20s, with about 70% humidity and light coastal breezes. It can turn hot, so heat management on the later laps matters more than the cold at the start.

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