Unbound Gravel 200
📍 Kansas, Flint Hills, USA
gravel
Date
3–6 June 2027
Distance
200mi · 100mi · 50mi · 25mi
Elevation
2,800 m
Difficulty
gravelmtbbeginner friendly
core4
Iowa, USA · 14-15 August 2026
Difficulty: 4/5 — Very hard
Core4 is a multi-surface gravel race in Iowa, offering distances up to 193km, challenging riders with a dynamic mix of gravel, B-roads, singletrack, and pavement. While providing options for all skill levels, the longer courses are designed to push participants to their limits.
Visit official site →- Distances
- 193km · 113km · 64km · 32km · 97km
- Surface
- gravel, tarmac, singletrack, dirt
- Typical W/kg
- 3–4.5
Rider fit
Who it's for
This event is ideal for cyclists seeking a diverse terrain challenge and a vibrant community experience, with options ranging from leisurely shorter rides to demanding pro-level endurance tests.
Who will struggle
Riders who are unprepared for significant mileage on varied surfaces, including technical singletrack and rugged B-roads, or those lacking the endurance for an all-day effort, particularly on the longest course, will find it challenging.
Training focus
Training should prioritize developing robust bike handling skills for multi-surface transitions, technical singletrack, and B-roads, alongside building endurance for sustained efforts over long distances.
Are you ready for this race?
Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.
FAQs
What are the available race distances for core4?+
The core4 race offers multiple distances to choose from, including 193km (120 miles), 113km (70 miles), 97km (60 miles, specifically for USAC juniors), 64km (40 miles), and a 32km (20 miles) option.
What kind of terrain will riders encounter during the race?+
Riders will experience a diverse multi-surface course that includes champagne gravel roads, rugged B-roads, flowing singletrack, and speedy paved sections, ensuring no surface is untouched.
Where does the core4 race take place?+
The race is set through the landscapes around and within the metro of Iowa City, Iowa, beginning in a rural setting north of the city at Wilson's Orchard.
Are there race categories suitable for professional or elite riders?+
Yes, core4 includes a 120-mile solo or team of three option, along with specific pro/elite race information and a 120-mile category for GES pros. There's also a 60-mile USAC juniors race.
Is the core4 race suitable for beginners?+
Yes, core4 is designed with courses offering something for every skill level, including shorter distances like the 20-mile and 40-mile options which do not include singletrack.
What kind of atmosphere and post-race activities can participants expect?+
Core4 promises a fantastic weekend of cycling and community celebration, featuring pre-celebrations and après delights, with food, drinks, music, and a vibrant afterparty.