Where the echoes of history meet the rhythm of your footsteps, the Shires and Spires Ultra Marathon on Sunday, 10th May 2026 offers a quintessential English trail adventure. Beginning in the historic village of Naseby, this 35-mile UTMB-indexed challenge weaves a spectacular loop through the pastoral heart of Northamptonshire, past iconic estates like Althorp and Holdenby House. With a unique course that reverses direction each year, you'll experience a fresh perspective on its captivating mix of quiet trails, country lanes, and breathtaking vistas. More than just a race, it’s a sensibly priced, mini-festival of running with distances for all, yet it demands self-reliance with mandatory kit and navigation. Choose your year, embrace the changing terrain, and test your spirit on a course that balances serene beauty with a genuine, grounding challenge.
Races Offered
10K
May 10, 2026
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Distance —
10K
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Type —
Running
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08:30
35 miles
May 10, 2026
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Distance —
56.3K
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Running
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08:30
Half Marathon
May 10, 2026
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Distance —
21.1K
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Running
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08:30
Marathon
May 10, 2026
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Distance —
42.2K
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Type —
Running
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08:30
Three Quarter Marathon
May 10, 2026
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Distance —
30K
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Type —
Running
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08:30
Weather History
These values represent the 3-year monthly averages for May in Naseby.
thermostatTemperature
8.4° / 16.5°
wb_sunnyFeels like
5.2° / 13.4°
light_mode
Avg sunshine hours
10h 15m
water_drop
Avg rainfall
1.9 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
14.1 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.2)
humidity_mid
Humidity
77.6%
wb_twilight
Sunrise
05:07
nightlight
Sunset
20:53
About Naseby
Learn more about the host city, Naseby.
Naseby is a village and civil parish in the West Northamptonshire unitary authority area of Northamptonshire, England. The population of the civil parish at the 2011 Census was 687.
