GTB Series Spring Edition – “A Grand Tour of Brittany”

The GTB Series Spring Edition is part of Erminig’s “Adventure & Discovery” lineup.

Our main goal is simple: helping you discover Brittany while introducing you to long-distance cycling on a route specifically adapted for gravel bikes. Even so, this adventure remains a real challenge for anyone wishing to experience multi-day bikepacking for the first time!

Running parallel to the Gravel Tro Breizh—the legendary but notoriously tough Breton event—Erminig is proud to offer an accessible alternative open to everyone.

From 2 to 9 May 2026, enjoy a route mapped out with love through Brittany, its myths, and its most iconic landmarks. On the agenda: 900 km to smoothly ease your way into long-distance riding and bikepacking.

🚴‍♂️ A 100% Accessible Gravel Adventure

Accessible routes designed to discover the long-distance world. A Gravel bike will be your perfect companion to roam the most beautiful corners of Brittany. Expect a mix of backroads, easy paths, and smooth tracks on an event that puts discovery and friendliness first!

• Zero Racing Mindset: Daily distances are well-balanced to ensure you have plenty of time to enjoy the Breton landscapes.
• The 2026 Checkpoints: Restaurants, bars, pubs, and crêperies will be scattered along the entire route to give you the warmest local welcome.
• Safety & Tracking: You will be equipped with a GPS tracker to ensure your safety and allow your loved ones to see exactly where you are. Since this adventure is not a competition, there will be no rankings and no final times.

An Accessible Long-Distance Adventure

For this edition, we offer a 900 km route to be completed over 8 days—which comes out to a very manageable daily average of 112 km.

The start and finish lines will be located at the exact same venue as our famous but challenging ultra-distance event: the Gravel Tro Breizh.

📍 The Base Camp: Lac de Trémelin

The Lac de Trémelin will serve as our start and finish base camp throughout the week. Located 30 km west of Rennes, the start line is easily accessible via TGV train.

While the route’s difficulty has been carefully adapted and smoothed out, it will still take you through the very same iconic places as the Gravel Tro Breizh.

🗓️ Schedule & Logistics

Saturday, 9 May (End of Day): The Finish LineYou will have until late Saturday afternoon to complete your journey and cross the final finish line.

Friday, 1 May (Late Afternoon): Welcome & Check-inArrive at our base camp right by the lake. This is the perfect time to meet, chat, and connect with the other participants before the big departure.

Saturday, 2 May (Morning): The Grand StartThe official start for the 100 participants will take place on Saturday morning.

900 km of Gravel Riding in Brittany

Starting from Lac de Trémelin, this 900 km route will take you on a journey to discover the most beautiful hidden gems of Brittany.

The care and attention put into designing this route are exactly the same as for all our premium events. This 900 km adventure offers an accessible course with a difficulty level tailored specifically for gravel bikes, making it perfect for beginners and less experienced riders alike. Expect quiet backroads, smooth tracks, and accessible paths.

Our team will be waiting at the finish line to welcome you back and hear all about your epic adventure!

📝 In Summary, the Spring Edition is:

• One keyword: Friendliness!
• One goal: Discovering the most beautiful corners of Brittany!
• One objective: Introducing you to long-distance riding gently!

The Route: Smooth Gravel Across Brittany

One Golden Rule: A Route Open to Everyone!

Whether you are a complete beginner or a seasoned rider, the route for this 2nd GTB Series Spring Edition is fully adapted for a Gravel bike.

The track will wind through Brittany using quiet backroads, easy paths, and smooth tracks that are highly accessible on regular gravel tires.

🪵 Adapted Difficulty, True Breton Character

While the route intentionally bypasses the grueling technical sections found on our flagship ultra-distance event, the Gravel Tro Breizh, keep one thing in mind: Brittany is far from flat!

• Gear up wisely: Choose your bike’s gearing accordingly.
• Ride stress-free: Don’t worry, the daily distances are perfectly balanced to ensure you won’t be pushed into the red, leaving you with plenty of energy to fully enjoy your journey.

🎯 The Ideal Format For You

We want to offer accessible tracks to help you discover the world of long-distance riding, whether you are less experienced or an absolute beginner. If you don’t care about racing the clock and just want to soak in the beauty of Brittany, then the GTB Series Spring Edition is your perfect match!

Discover the Best of Brittany

From its rugged coastlines and deep forests to its rolling countryside and heartland center, Brittany boasts an incredibly rich variety of landscapes.

A 900 km journey is the absolute perfect distance to discover a vast majority of these diverse settings.

To keep the magic alive, the route changes every year, allowing you to explore brand-new places. After all, one single trip is never enough to discover everything Brittany has to offer!

🪵 Scouted and Mapped with Love

As with all our events, the route is thoroughly scouted and drawn with passion. We ride here all year round—Brittany is our backyard. What better way to know every hidden gem and share it with you!

2026 Route – Heading South!

After exploring Northern Brittany, this year we are heading south! And since Brittany is surrounded by numerous islands… after visiting Ouessant during our 1st edition, we are taking you to a brand-new island!

Belle-Île is on the agenda for 2026. While this island detour is completely optional, it would be a shame to miss out on the Pointe des Poulains, the Aiguilles de Port-Coton, and everything else that makes Brittany’s largest island so breathtakingly beautiful.

🌊 From River Valleys to the Atlantic Coast

• The Inland Escape: The route will first take you along the beautiful Vilaine valley, heading down toward the Loire-Atlantique region.
• The Ocean Shoreline: Next, you will ride through the stunning Gulf of Morbihan, continuing your journey along the Atlantic coast and the wild shores of Morbihan and Southern Finistère.
• The Jewel of the West: Of course, Crozon will not be forgotten! The absolute gem of Brittany will treat you to endless ocean views all along the peninsula.

🪵 The Return Through the Heartland

Your journey back will take you right through Central Brittany, crossing iconic landscapes such as the mystical Monts d’Arrée, the scenic Lac de Guerlédan, and the legendary Brocéliande Forest.

So, tempted by this journey of adventure and discovery? Don’t wait too long to secure your spot!

What to Know Before Registering

• Age Requirement: You must be 18 years old at the time of the start. Minors, even if accompanied by an adult or parent, are strictly not allowed.
• Medical Fitness: You must be medically fit for long-distance gravel events (a self-declaration form will be required).
• No Selection Vetting: First come, first served!
• Limited Capacity: Registrations are strictly capped at 100 participants.
• Regulations: You must read the Participant Guide and its regulations (registering implies full acceptance of these terms).

🛑 Important Note: Once registered for the GTB Series, you cannot switch to the Gravel Tro Breizh. These two events are entirely independent, with different philosophies and difficulty levels.

💳 Registration Fee & What’s Included

Registration opens on Monday, 1 September at 7:00 PM.

The entry fee is €195 and includes:

• 🛰️ GPS Tracker Rental: For live online tracking via a dedicated app (so your loved ones and the organization can follow your progress).
• 🗺️ Navigation: The official GPS track of the route to use on your bike computer or smartphone.
• 🎁 The “Degemer Mat” Bag: Our signature welcome pack filled with local Breton products and goodies from the association.
• 🍼 2 Custom Water Bottles: Biodegradable/compostable TACX bottles customized with the event’s design.
• 🧢 1 Collector Cycling Cap: Exclusive to the event.
• 🍻 Welcome Drink: On Friday evening, 1 May (the night before the start).
• 📖 A Custom Roadbook: Featuring our top recommendations for stops, including a selection of bars, restaurants, and sights approved by L’Hermine.
• 🛂 The Event Passport: To get stamped and validate your checkpoints.
• 🧡 Event Infrastructure & Crew: The warm welcome and assistance from our dedicated volunteers throughout the event.

🌿 The registration fee only covers the actual costs incurred by our association for your participation. No profit is made on registrations. Our non-profit association receives no subsidies or corporate sponsor funding.

Before You Register

Please make sure to thoroughly read the Participant Guide before signing up. This document contains crucial information regarding your participation. Your registration implies full acceptance of the regulations contained within this guide.

✍️ Register for the GTB Series Spring Edition

• 📅 Registration Opens: Monday, 1 September at 7:00 PM.
• 🏁 Registration Closes: Sunday, 26 April 2026 (or as soon as the event sells out).

🛡️ Optional: Cancellation Insurance

Cancellation insurance is available directly during checkout. It covers all unpredictable and sudden causes. If you face an unforeseen and/or accidental issue preventing you from participating, you will be refunded up to the day before bike check-in (i.e., until Thursday, 30 April 2026), subject to a 20% deductible.

We strongly recommend subscribing to cover any last-minute complications; a sudden injury in the final weeks is always possible and deeply regrettable. No refunds can be processed by the organization without this insurance. For just a few extra euros, it is highly recommended!

⚠️ Please Note: Registrations are final. Without cancellation insurance, no refunds will be possible. Reselling your spot or deferring it to a later edition is not permitted. Once registered for the GTB Series, switching to the Gravel Tro Breizh is not possible.

🔗 👉 REGISTER FOR THE GTB SERIES SPRING EDITION 2026 👈