6-week Spring UNBOUND Gravel training plan (Zwift compatible)

If you’re an intermediate cyclist targeting UNBOUND Gravel and coming out of winter ready to build with intent, this 6-week plan is designed to kick-start your spring training and guide you toward the specific demands of the world’s most iconic gravel race. It’s the ideal transition phase to rebuild rhythm, lift fitness, and develop the durability, efficiency, and resilience required for the long, punishing days on the gravel roads of Emporia and the Flint Hills.

Who’s it for?
This training plan is aimed at intermediate gravel riders with a solid base of fitness who are ready to move into a more purposeful build toward UNBOUND. Whether you’ve trained consistently through winter or are sharpening your focus as conditions improve, this plan provides structure and direction at exactly the right stage of the season. It’s shaped by real race experience and a clear understanding of what UNBOUND demands physically, mentally, and logistically.

Is it for you?
This plan assumes you’re comfortable riding both indoors (such as Zwift) and outdoors, and happy blending structured quality sessions with longer endurance rides as daylight increases and weather improves. It’s ideal if you want to transition smoothly from winter training into more event-specific preparation without burning out, while rebuilding aerobic fitness, strength, and long-ride durability. The focus reflects the realities of UNBOUND: long hours at steady tempo, rolling and relentless Flint Hills terrain, frequent changes in rhythm, unpredictable conditions, and extended time riding exposed gravel roads where pacing, fuelling, and resilience are critical.

What’s involved?
The plan builds progressively over 6 weeks, carefully balancing structure with flexibility to support consistent progression. Each week targets the key training zones, using indoor sessions for precision and efficiency alongside outdoor rides to develop endurance, fatigue resistance, and real-world gravel skills. There’s a strong emphasis on aerobic conditioning, sustained tempo and sweet-spot work, and maintaining power as fatigue accumulates; all crucial for handling the endless rollers, long exposed stretches, and cumulative load of racing gravel around Emporia, including iconic sections such as the Flint Hills and long, remote farm roads.

The goal isn’t to peak during these six weeks. Instead, it’s to come out of this block fitter, tougher, and more confident, perfectly positioned to move into the final, more UNBOUND-specific preparation phase ready for big miles, big gravel, and one of the toughest endurance challenges in cycling.