Chelmsford Half Marathon
Chelmsford, United Kingdom · Monday 12 October 2026
The Chelmsford Half Marathon is held in the town of Chelmsford, located in Essex, England. The race features a scenic route through the town center, parks, and the surrounding countryside. Runners enjoy views of Chelmer Park, Hylands House, and the River Chelmer. The course is mostly flat, with a few small hills along the way. After the race, participants can visit Chelmsford Museum and Essex Regiment Museum, enjoy a walk in Hylands Park, or explore Chelmsford’s historic town center.
Difficulty Calculator
h
:m
:s
Adjusted Time
1:43:26
Time difference: -1.6 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain112m
Elevation High43m
Elevation Low19m
Weather Forecast
High15°C
Low4°C
Chance of Rain0%
How hard is Chelmsford Half Marathon?
Moderateharder than 20% of half marathons
Flattest / easiestHardest
On our difficulty model, Chelmsford Half Marathon plays about even with an average road half marathon for a 1:30 runner. It ranks #358 hardest of 450 half marathons we analyse, and #74 of 89 in United Kingdom. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Chelmsford Half Marathon?
Estimated finish times on this course versus the same effort on an average road half marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Chelmsford Half Marathon | Difference |
|---|---|---|
| 1:30:00 | 1:28:20 | −01:40 |
| 1:45:00 | 1:43:26 | −01:34 |
| 2:00:00 | 1:58:32 | −01:28 |
| 2:15:00 | 2:13:38 | −01:22 |
| 2:30:00 | 2:28:45 | −01:15 |
| 2:45:00 | 2:43:52 | −01:08 |
| 3:00:00 | 2:58:59 | −01:01 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Chelmsford Half Marathon 2026 Course Analysis
Chelmsford Half Marathon is a half marathon held in Chelmsford, United Kingdom. It is scheduled for Monday 12 October 2026. The course is run on road surface with 112m of total climbing, with its high point near 43m above sea level. For registration and full race details, visit the official Chelmsford Half Marathon website.
Elevation Profile
With 112m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for October, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 4°C to 15°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (0%), so dry conditions are likely.
Surface Type: Road
Chelmsford Half Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Chelmsford Half Marathon against other half marathons to find the right race for your goals.
Half marathons of similar difficulty
If Chelmsford Half Marathon fits your goal, these courses play out about the same on our difficulty model.
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