Your Ultimate Guide to The Filthy 50

The Spirit of the Driftless

The philosophy here is simple: the gravel roads are always there for you to enjoy. We just provide the community, the course, and the hero’s welcome to make the experience complete. From the rolling hills of Amish country to the notorious minimum maintenance roads that give the event its "filthy" name, every mile is designed to showcase the best of Southeast Minnesota. We believe in inclusive adventure, where the camaraderie at the finish line is just as important as the grit shown on the climbs.

What to Expect

The Terrain - Expect a mix of fast-rolling gravel, chunky limestone, and challenging minimum maintenance roads (MMR) that can change character depending on the weather.
The Climbs - The Driftless region is famous for its punchy elevation. You will encounter legendary sections like Dew Drop and Grub Hill that will test your gearing and your resolve.
Amish Country Etiquette - Parts of the course travel through active Amish communities. Expect to see horse-drawn buggies and please share the road with respect and a friendly wave.
Community Vibe - The start and finish take place in the middle of downtown Lanesboro, offering a festival atmosphere where riders and locals mingle to celebrate the day’s achievements.
The Finish - Rolling back into town after tackling the final stretch on Grit Road provides a true "hero's welcome" that makes every foot of climbing worth the effort.

Course Descriptions

We offer two distinct ways to experience the filth, ensuring that riders of all skill levels can find their perfect challenge. Both routes highlight the unique topography of Fillmore County.

Course Name	Approx. Distance	Elevation Gain	Key Features
The Pretty Filthy	25 Miles	1,900+ Feet	Grosbeak and Gentle climbs, Easy Street descent, Gribben Creek, and the Grit Road finish.
The Filthy 50	50 Miles	3,200+ Feet	Dew Drop climb, The Big Woods, Amish-maintained MMRs, Grub Hill, and Grit Road.

The Pretty Filthy 25 is our recommended entry point for those new to the gravel scene. It packs a significant punch with nearly 2,000 feet of climbing but stays focused on the scenic beauty of the valleys. For those seeking the full experience, The Filthy 50 takes you deeper into the wilder sections of the county, featuring more technical minimum maintenance roads and the infamous "Big Woods" section where the canopy closes in and the gravel gets real.

Event Highlights & Support

Aid Stations - Fully stocked checkpoints are strategically placed to keep you hydrated and fueled. Expect more than just water - our volunteers bring the energy and the snacks to keep your pedals turning.
Minimum Maintenance Roads - These are the "wild" segments of the course. Often un-groomed and naturally rugged, these sections are where the "Filthy" in the event name is truly earned.
Post-Ride Celebration - Once you cross the finish line, the party begins. Lanesboro’s local shops and eateries welcome riders with open arms, providing the perfect setting for a post-ride meal and storytelling.
Scenic Vistas - Keep your eyes up! Between the challenging climbs, you will be rewarded with panoramic views of the root river valley and the pristine Minnesota countryside.
Mechanical Support - While we encourage all riders to be self-sufficient, we provide basic support to help ensure everyone makes it back to downtown for the festivities.

The Filthy 50 Preview

The Filthy 50 Highlights

Frequently Asked Questions

What kind of terrain should I expect on the course?

The route features a diverse mix of fast-rolling gravel, chunky limestone, and the notorious minimum maintenance roads (MMR) that give the event its name. You will experience the unique topography of the Driftless Area, including deep valleys, limestone bluffs, and winding creek-side paths.

What type of bike and tires are best for this event?

A gravel-specific bike or mountain bike is highly recommended to handle the varied surfaces and "filthy" MMR sections. Most riders prefer tires between 38mm and 45mm with a versatile tread pattern to balance speed on the flats and grip on the rugged climbs.

Is The Filthy 50 suitable for beginner gravel riders?

Yes, we welcome riders of all skill levels, from seasoned grinders to road cyclists looking for their first off-road adventure. Our community-focused atmosphere ensures that the camaraderie at the finish line is just as important as the grit shown on the course.

Are there aid stations along the route?

Yes, we provide well-stocked aid stations to help you refuel and stay hydrated throughout the ride. Please check the event website for the latest details regarding specific station locations and the types of nutrition that will be available on course.

What happens if it rains before or during the event?

The event typically takes place rain or shine, and wet weather can significantly change the character of the minimum maintenance roads. Riders should be prepared for potentially muddy conditions and should check the event website for any weather-related equipment tips or safety updates.

What is the post-ride atmosphere like in Lanesboro?

Lanesboro is a celebrated cycling sanctuary that offers a hero's welcome to every finisher. After the ride, participants can enjoy a vibrant post-ride celebration in the heart of town, making it the perfect opportunity to share stories and connect with the gravel community.

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The Filthy 50

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