ISTRIA 300 takes place on Sat, Oct 3, 2026 in Poreč, Croatia. The main route is 300 km.
- Date
- Sat, Oct 3, 2026
- Start
- Poreč 🇭🇷
- Distance
- 300 km
- Level
- Open to all
Istria 300 is a major recreational road cycling event starting and finishing in Poreč, Croatia, offering flexible distances up to 300 kilometres on fully closed roads.
Official event pageWhat this race demands
Istria 300 demands exceptional endurance to cover 300 kilometres on the road in an October event.
Ultra Distance Capacity
Covering 300 kilometres requires sustained aerobic efficiency and high resistance to muscular fatigue over many hours in the saddle.
Late-Season Durability
Taking place in October, the event requires pacing strategies and physical resilience to maintain output across potentially cooler autumn conditions.
A target of 60 to 90 grams of carbohydrates per hour is recommended to sustain energy levels across the extended duration of a 300-kilometre ride.
What would it take you?
Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.
Estimated finish
9:20–11:15
Peak-week training
6–8 h/week
A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.
IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal
Your road to race day
Race day at ISTRIA 300 is 6 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak3 weeks · Aug 23, 2026 – Sep 12, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Sep 13, 2026 – Sep 26, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 27, 2026 – Oct 3, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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