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Istria 110K by UTMB training plan: 2027 race guide

Buzet, Croatia3 April 2027

Start trainingOfficial entry & details

Verified Buzet 100K Trail Ultra 2027: date, location, official course signals, training timeline, tools, and race-week checks.

Updated Oct 17, 2026 · Verified Oct 14, 2026

The race at a glance

Elevation gain
4200 m

Route and elevation

Official 100K-category distance: 111 km. Official published elevation gain: approximately 4200 m. Official course profile: mountainous trail. Use the current organizer GPX, mandatory-gear list, aid plan and cutoff table for final decisions.

Race guide

Race overview

Istria 110K by UTMB is listed by the organiser for Buzet, Istria County, Croatia. The currently published event date is 2027-04-03. This page was checked against official event-organizer pages on 2026-07-26. Check the official entry page for current availability and eligibility.

The organiser lists this as a Istria 110K trail race over 111 km with approximately 4200 m of climbing. The currently published profile is mountainous; use the latest organiser GPX, mandatory-gear list and cutoff table for final decisions.

The organiser remains the reference for entry eligibility, exact start time, division or age-group rules, equipment, course changes, cutoffs and cancellation policies. Recheck the official event page before paying for travel and again when the current athlete guide is released.

Final official-source checklist

Within race week, reopen the official event page and confirm date, venue, start procedure, entry status, course, rules, equipment, cutoffs and emergency guidance. Keep the current athlete guide available offline if the organiser provides one.

Further reading

Training plan and timing

Compare the start dates below, then choose a plan that fits your current training and available time.

21 weeks and 4 days remain until the listed 3 April 2027 race day.

  1. Start3 October 2026
  2. Build26 weeks
  3. Taper3 weeks
  4. Race day3 April 2027

All standard starts have passed. Choose a plan that matches your current readiness or a later event; do not compress missed weeks.

26-week plan option

Explore training plans

Need a printable plan? Download the 100K training plan PDF.

Race-day strategy

  • Pace climbs by effort instead of chasing an even split.
  • Practise controlled climbing and descending before race week.
Open race calculators and tools
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Ultra cutoff plannerFueling schedule plannerTraining start-date calculator100K training plan PDF

Race-week logistics

Use the current organiser guide for schedules, transport, cutoffs, equipment, and other time-sensitive instructions.

Current details to confirm: start schedule, expo, bib pickup, transport, cutoffs, equipment rules, entry price.

Adaptive AI coach for iPhone

Your race deserves more than a static plan.

Your adaptive AI coach builds around this finish line, follows the training you complete, and adjusts upcoming work around recovery, travel, missed sessions, and race week.

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FAQs

When is this race?

Istria 110K by UTMB is currently listed for 2027-04-03. Recheck the official page before booking because event details can change.

Where is this race?

The official event page lists Istria 110K by UTMB in Buzet, Istria County, Croatia. Confirm the venue address and access instructions on the current event page.

How long should I train for this race?

Compare the 26 week plans with your current consistency, event-specific demands, recovery and available runway. Do not compress missed weeks if a standard start date has passed.

What should I verify before entering this race?

Check the current date, entry status, eligibility, course or venue layout, equipment, cutoffs, cancellation terms and travel demands on the official organiser page.

Is the course information for this race final?

No. The distance and current high-level course signals come from official organizer material. Use the latest map or GPX, athlete guide, elevation profile, aid plan and cutoff table for final decisions.

Can a calculator predict my race result?

No. Calculators organize assumptions. Weather, terrain, venue flow, transitions, nutrition, health, crowding and late-race fatigue can change the result.

How many weeks until this race?

The listed race date is 2027-04-03. Use the training start-date calculator for the number of weeks remaining today; select a plan only after checking that its opening workload fits your recent training.

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Sources