Unbound 100 is 103 miles on the flint gravel of the Kansas Flint Hills in late May or early June — chunky, sharp rock that slices sidewalls, and clay that turns to tire-clogging mud when it rains. The climbing is modest, but the heat is real and the surface is relentless: it’s a day decided by durability, tire choices, and staying fueled in the sun far more than by raw fitness.
This is an eight-week plan for Unbound’s heat and distance, built around the hours you have — and it assumes you already have endurance to build on. Eight weeks extends your durability and heat tolerance; it isn’t enough to build that endurance base from scratch.
103 MI · 4,373 FT CLIMBING · ~90% FLINT GRAVEL, ~10% PAVED · 8 WEEKS · 7–11 HR/WK · FINISHER
WHAT'S INSIDE
- Structured workouts on your calendar, with real power and heart-rate graphs
- Strength work built in, with video walkthroughs
- Weekly notes from me, plus the Gravel Grit mental program
- A testing week, so the plan runs on your real numbers
- The full Unbound Gravel 100 guide — terrain, gearing, fueling
Hey! I'm Matti - also known as the Gravel God himself!
If you're into gravel racing and want to be as fast as possible, you had better choose me!
Why?
Because I'm the fastest, least talented person to ever ride a bike. I've made every mistake in the book so you don't have to and I'm here to save you years of failure and struggle.
When I'm not helping my athletes get faster on a bike I write obvious, overlooked training content that makes cycling training easy to understand.