gravelEmporia, Kansas, United States

How to train for Unbound Gravel

Unbound Gravel is the spiritual home and crown jewel of modern gravel racing, testing riders over tire-slashing flint roads in the rolling hills of Kansas.

Entries: Lottery registration opens in January for the premier Flint Hills race.

Distance
About 160–320 km
Elevation
About 1800–3500 m
Typical Finish
About 6–16 hours
Preparation
20 weeks

What Unbound Gravel demands

Relentless tire-slashing sharp rock, intense midday heat, fierce winds and self-supported mechanical self-sufficiency over 10 to 16 hours.

Chunky & loose gravelRolling terrainHeat & exposed sectorsSelf-supported & remote

Your preparation roadmap

20 weeks recommended
Phase 1January–February

Base training plan

6 weeks progression
Phase 2March

Sweet spot training plan

6 weeks progression
Phase 3April–May

Gravel training plan

6 weeks progression
Phase 4June

Peak & Taper

2 weeks progression

Winter on the trainer

Train long steady tempo blocks and heat adaptation while locking in hydration and calorie strategies.

Flint Hills tempo progressionIndoor trainer

3x30 min steady tempo at 82 to 85% FTP with minimal coasting.

Unbound mock race enduranceOutdoor long ride

6 to 7 hours outside on rough gravel with loaded hydration pack.

Heat and fuelling resilience blockIndoor trainer

2x40 min sweet spot in warm room conditions practicing electrolyte intake.

Short sharp roller surgesIndoor trainer

8x1 min at 115% FTP simulating punchy Kansas hills.

Core indoor training blocks:FTP builder plan →

Routes (approximate, recent editions)

  • Unbound 200 — about 320 km and 3,500 m climbing across sharp flint rock
  • Unbound 100 — about 160 km and 1,800 m climbing
  • Unbound XL — about 560 km self-supported expedition

Key climbs & sectors

  • Flint Hills Rollers

Frequently asked questions

How hard is Unbound Gravel?

Relentless tire-slashing sharp rock, intense midday heat, fierce winds and self-supported mechanical self-sufficiency over 10 to 16 hours.

How many weeks do I need to train for Unbound Gravel?

We recommend 20 weeks of structured training to build a durable aerobic base, sustained climbing or gravel power, and event-specific stamina.

Can I prepare for Unbound Gravel indoors on a trainer?

Train long steady tempo blocks and heat adaptation while locking in hydration and calorie strategies. High-quality interval workouts and threshold blocks are often more time-efficient on an indoor trainer.

What are the key climbs and sectors of Unbound Gravel?

Flint Hills Rollers. Official routes can vary across editions — always verify current course details on the official website.

When do entries open for Unbound Gravel?

Lottery registration opens in January for the premier Flint Hills race. Consult the official site at https://www.unboundgravel.com for entry details and registration openings.

Build your Unbound Gravel plan

Register free to get a 20-week preparation preview for Unbound Gravel. The full schedule, editing and plan activation are part of PRO.

Preview my Unbound Gravel planFree preview: week 1 unlocked. Full schedule with PRO.

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Ready to train for Unbound Gravel?

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Preview my Unbound Gravel planFree preview: week 1 unlocked. Full schedule with PRO.

TrainCraft is not affiliated with Unbound Gravel. Route figures and elevations are approximate and based on recent editions. Always verify current routes, dates and entry regulations on the official Unbound Gravel website.