DateExpected
Mid August 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Mount Errigal Hotel car park, Letterkenny, County Donegal
Letterkenny Municipal District, County Donegal
Countdown
August
The middle option: 333 km in one loop, a proper day in the saddle that stops short of the full 555. Gentle climbing for the distance, so it is mostly a test of pacing.
Key facts
01Riders leave in staggered starts, 2 minutes apart, individuals and teams
02Ranked by team size and racing class
Create a free training plan for the Donegal Ultra 555 333 km
7-day free trial, no card required
The course
The route
Letterkenny Municipal District
Distance333km
Total climb3,916m
StartElevation
0 kmDrag map to rotate313.7 km
Weather
Mid-August, Letterkenny Municipal District
17°CTypical high
12°CTypical low
7°CColdest in 20 years
75%Days with rain
Highs around 17°C and lows around 12°C, but it has dropped to 7°C. Rain on 75% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Kanturk CC09:42:1134.3 km/h
02Team Ryan-Paddy10:19:5232.2 km/h
03Errigal CC 111:25:5229.1 km/h
16
Finishers
12:21:39
Median time
26.9 km/h
Median speed
Overall · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Donegal Ultra 555 333 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Donegal Ultra 555 333 km plan targets
Typical sessions
333 km with 3,916 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Sustained climbing repeats on real gradients
Group rides for drafting and bunch-riding skills
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Donegal Ultra 555 333 km plan.
7-day free trial, no card required.
Other races at Donegal Ultra 555
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