4.0
(67)
469
hikers
46
hikes
Hiking in Forêt De La Groulaie features a mixed woodland environment with sessile oaks, beeches, maritime pines, and Scots pines. The area includes small ponds and remnants of an ancient iron industry, known as "scories." Trails often follow the Nantes-Brest Canal, offering views of the waterway and surrounding natural features. The terrain generally presents minimal elevation changes, making it accessible for various hiking abilities.
Last updated: July 5, 2026
4.7
(6)
36
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.0
(1)
16
hikers
14.4km
03:41
50m
50m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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8
hikers
3.13km
00:47
0m
0m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
5.0
(3)
17
hikers
13.7km
03:27
20m
20m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
10
hikers
7.09km
01:48
20m
20m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Beautiful view of the canal from the bridge
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A friendly place for a break with a pleasant view
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This is lock number 11. On the other bank you can admire the Groulaie forest.
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Beautiful medieval castle. The main building is more recent. As a side note, the Isac River fed the castle's imposing moats, now dry, before being channeled to the current marina.
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The Monkey Bike Bar is a must-see place (Bar) on the Nantes-Brest canal! ideally located on the port of Blain with a terrace to quench your thirst with a nice view! Plus there is a bike shop behind the bar (Cycles riflet). Don’t hesitate to stop by! schedules available on Google and social networks, depending on the seasons.
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Located at the exit of the town of Blain, just next to the Nantes-Brest canal, this old medieval fortress invites you to walk in the footsteps of its prestigious guests such as the King of France Henry II, Queen Catherine de Medici or Duchess Anne of Brittany.
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The Château de la Groulais was the largest fortress in the region at the time and was the home of several personalities, including Olivier V de Clisson and Marie Bonaparte, etc.
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The Château de la Groulais, or Blain, is a medieval fortress located in the town of Blain, in Loire-Atlantique. Built in the 12th century by the Duke of Brittany Alain Fergent, then enlarged in the 13th century by the constable Olivier I de Clisson, and heavily remodeled in the 16th century in the Renaissance style, it was part of the defenses of the Franco-Breton border with the castles of Vitré, Fougères, Châteaubriant, Ancenis and Clisson.
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Forêt De La Groulaie offers a wide selection of routes, with over 40 hiking trails to explore. These range from easy, short walks to more moderate options.
The forest features a mixed woodland environment with sessile oaks, beeches, maritime pines, and Scots pines. Trails often follow the scenic Nantes-Brest Canal. The terrain generally presents minimal elevation changes, making it accessible for various hiking abilities.
Yes, a significant attraction is the medieval Château de la Groulais, located alongside the Nantes-Brest Canal. You can also discover small ponds, remnants of an ancient iron industry known as 'scories,' and enjoy the diverse plant life along the canal's towpaths.
Many trails in Forêt De La Groulaie are suitable for families, particularly the easy, short walks with minimal elevation gain. Routes like the Château de la Groulais – Lock 11 — La Prée loop from Blain are generally accessible and enjoyable for a wide audience.
While specific restrictions may vary, forests in France generally welcome dogs on leash. It's always recommended to keep your dog under control to protect wildlife and ensure a pleasant experience for all hikers.
Yes, Forêt De La Groulaie offers several circular routes. For example, the Circuit des Sites and the château de la Groulais — loop from Blain is a popular option that circles the historic castle.
Parking is typically available near trailheads, especially in and around Blain, which serves as a common starting point for many routes. Specific parking information can often be found on individual route descriptions or local signage.
The Forêt De La Groulaie is located near Blain. While direct public transport to every trailhead might be limited, Blain itself is generally accessible, and some routes start directly from the town, making it possible to combine public transport with a short walk to the trailhead.
The mixed woodland environment of Forêt De La Groulaie offers a rich and changing arboreal landscape throughout the seasons. Spring and autumn are particularly pleasant for hiking, with mild temperatures and beautiful foliage. Summer can also be enjoyable, especially under the tree cover, while winter offers a different, quieter perspective.
The routes in Forêt De La Groulaie are highly rated by the komoot community, with an average score of 3.9 stars from over 50 reviews. Hikers often praise the peaceful forest paths, the historical charm of the Château de la Groulais, and the pleasant walks along the Nantes-Brest Canal.
Absolutely. Forêt De La Groulaie has 18 easy routes perfect for beginners or those seeking a leisurely stroll. An example is the Château de la Groulais – Lock 11 — La Prée loop from Blain, which is an easy 4.4-mile trail.
The forest boasts a diverse mixed woodland environment, characterized by sessile oaks and beeches. You'll also find maritime pines and Scots pines, which were introduced in the 19th century. The area's small ponds and the Nantes-Brest Canal also support a wide array of aquatic plants and flora.
Yes, many routes in Forêt De La Groulaie incorporate sections along the Nantes-Brest Canal. These trails often follow the towpaths, offering scenic views of the waterway and opportunities for birdwatching. The Château de la Groulais – Blain Cycle Bridge loop from Blain is a moderate path that follows sections of the canal.


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