Sundgau route: the forgotten bunkers

A hike starting from Hirtzbach that passes through Largitzen and Heimersdorf.

There are many remnants of theFirst World War along the route.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 13.82 km
  • ◔
    Average duration: 4h 20 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 135 m
  • ↘
    Descent: - 137 m

  • ▲
    Highest point: 417 m
  • ▼
    Lowest point: 309 m
  • ⚐ Country: France
  • ⚐ City: Hirtzbach (68118)
  • ⚑
    Start/End: N 47.593906° / E 7.219967°
  • ❏
    IGN map(s): Ref. 3621ET
  • Hour-by-hour weather

Photos

Description of the walk

Parking is available near the café "À la Couronne" at the corner of Rue de la Montagne and Rue Principale.

(S/E) Cross the bridge and turn left until you reach the next bridge. Turn right up Rue des Champs to the calvary.

(1) At the calvary, follow the tarmac path marked Blue Ring on the right, which immediately turns left, and walk about 1.5 metres. An observation post is visible on the right, hidden in the vegetation, after about 500 metres (it is not marked on the IGN map). After entering the woods and passing the first intersection, continue straight ahead to reach the edge of the Neuweiher (weiher = pond).

(2) Leave the Blue Ring, which branches off to the right, and continue straight ahead. Follow the Green Saltire markings. The foundations of a bunker can be seen on the left of the path before you reach the firing range.

(3) When you reach the Untergemeindeweiher, take the left bank and follow the Green Saltire for about 1.5 km. Between the first two ponds, on the right, are the remains of a bunker.

(4) In front of the Neuweier (not to be confused with its namesake encountered earlier), turn left, still following the Green Saltire. Pass between two ponds and arrive at the D17.

(5) Cross the D17 and continue straight ahead, following the Green Saltire to the farm.

(6) At the calvary, turn left, leave the Green Saltire and follow the Red Triangle markings. As you enter the woods, on both sides of the path, there are a few bunkers in poor condition (they are not marked on the IGN map). After about 1.5km, you will arrive at the Steinbach crossroads.

(7) A beautiful spot where you can enjoy a peaceful meal surrounded by greenery. The remains of a fortification can be seen here. Take the path uphill on the right, following the Red Triangle markings. Enter the village of Heimersdorf, follow Rue des Vergers and then turn left onto Rue des Œillets (Red Triangle).

(8) At the Calvary, leave Rue des Œillets and go up Rue du Chariot on the left, following the Red Triangle markings.

(9) After a crossroads and a farm, on both sides of the path, there is a line of casemates in very good condition. Continue straight ahead for a little over 100 metres, leaving the Red Triangle. At the crossroads, turn left towards the west. The path then heads north and follows the Green Cross markings.

(10) At the crossroads, leave the Green Cross and continue straight ahead, northwards to the entrance to Hirtzbach via Rue de la Montagne, directly below the power lines.

(11) Upon entering the village, turn right and go down Rue du Réservoir, then, at the cemetery, turn right onto Rue du Cimetière. Continue left until you reach the entrance to Reinach Park.

(12) Walk around Reinach Park, then when you leave the park, turn left towards the church and cross Rue Principale and the bridge.

(13) Walk up Rue Principale on the left to the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 316 m - Parking is available near the Café "la Couronne".
  2. 1 : km 0.26 - alt. 326 m - Calvaire (Blue Ring)
  3. 2 : km 1.75 - alt. 388 m - 1st Neuweiher (Green Saltire)
  4. 3 : km 2.35 - alt. 395 m - Turn left at the Green Saltire
  5. 4 : km 3.79 - alt. 406 m - 2nd Neuweiher follow the Green Saltire
  6. 5 : km 4.39 - alt. 414 m - D17 (Green Saltire)
  7. 6 : km 4.95 - alt. 403 m - Calvary (Red Triangle)
  8. 7 : km 7.42 - alt. 373 m - Steinbach crossroads
  9. 8 : km 9.01 - alt. 363 m - Rue du Chariot, Red Triangle
  10. 9 : km 9.61 - alt. 389 m - Casemates
  11. 10 : km 10.84 - alt. 383 m - End of Green Cross, straight ahead
  12. 11 : km 12.01 - alt. 344 m - Crossroads, Rue du Réservoir
  13. 12 : km 12.61 - alt. 310 m - Reinach Park
  14. 13 : km 13.23 - alt. 309 m - Main Street
  15. S/E : km 13.82 - alt. 316 m - Parking is available near the Café "la Couronne".

Notes

There are numerous water sources along the route, so be sure to bring sturdy shoes and a water bottle + filter.
The hike is easy but relatively long, so bringing a snack may be a good idea, as there are many places that are perfect for this.

Worth a visit

(2) Table + benches + shelter + fire pit
(7) Table + benches + fire pit

Reviews and comments

4.4 / 5
Based on 6 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.7 / 5
Route interest
4.2 / 5
TAurélien
TAurélien

Overall rating : 4.7 / 5

Date of your route : May 11, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

A very interesting hike due to its shaded start.
The series of ponds is great. I came across lots of mountain bikers on the trail. Forest paths, roads, fields – a good mix for tired feet and knees. Top
I didn't take the time to look for all the forgotten remains, some of which are obvious (point 1), while others are perhaps best left to the imagination. (Point 7, for example, is quite vague, but I imagined a fortification on the left overhang of the path to take.)
I didn't feel like going into the freshly sown fields to look at the casemates at point 9 either (visibility is reduced if the maize is ripe).
The duration for a good walker is estimated at just over 2 hours and 40 minutes... If you linger at each pond or bunker, I can understand the 4 hours and 20 minutes.
I don't want to play survivalist, I didn't understand if it was a joke or not about the filters. (There will be many technical advances in 2025 in the field of water bottles and flasks!)
Enjoy the walk and the description.

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sylvie68
sylvie68

Overall rating : 3 / 5

Date of your route : Oct 23, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★☆☆ Average
Very busy route : No

Beautiful route, lots of bunkers that are difficult to find, as well as the start of the hike.

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matt068
matt068
• Edited:

Overall rating : 4.3 / 5

Date of your route : Oct 30, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A very beautiful walk with no particular difficulty except for its length (over 4 hours).
I did it in two stages (about two hours each time).
The first time, I did the part with the ponds from Hirtzbach.
I returned to the village by following the D17 from Largitzen.

Be careful, this road is dangerous. In the initial itinerary, you just have to cross it.

The second time, I set off from Reinach Castle, again from Hirtzbach, then headed towards Heimersdorf from the cemetery, following the route marked with a Green Cross. It is on this section of the route that you can see the numerous (German) bunkers dating from the First World War. They are marked on my IGN 3621 ET map.

The only downside to this walk is that on both sections of the route, you pass under a high-voltage power line.

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RafRuns
RafRuns

Overall rating : 4.7 / 5

Date of your route : Mar 19, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A lovely walk in the Sundgau region. The bunkers are quite difficult to find when there is vegetation (I cycled past them ten times without seeing them!), but that's also part of their charm.
Lots of little ponds that invite contemplation.
Thank you for this post!

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jmchang
jmchang

Overall rating : 5 / 5

Date of your route : May 31, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

My only regret is that the advertised bunkers were difficult to find and could have been marked on the map.

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Yukulovicz
Yukulovicz

Overall rating : 5 / 5

Date of your route : Mar 07, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

The route is really very pleasant and varied (forest, plains, villages, farms, lakes) and the directions are perfect. Thank you very much for this route!

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