From Sewen to the Morteville rocks via the balloon

Discover the Roches de Morteville, Sewen and Alfeld lakes, the large stone, the statue of Joan of Arc and the waterfalls.

Hike on the verge of (very) difficult. GPX track strongly recommended.

(!) 20 November 2023. Please note that part of the route has been closed by municipal decree since 2021 between the section and (5) and (7). A detour has been put in place (Blue Triangle and Yellow-White-Yellow Rectangle at the end). This extends the route by 15 to 20 minutes and adds 100 m of elevation gain.

Route between (5) and (7) updated on 13 May 2025

Details

25693
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 22.46 km
  • ◔
    Average duration: 9h 30 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 1,078 m
  • ↘
    Descent: - 1,078 m

  • ▲
    Highest point: 1,247 m
  • ▼
    Lowest point: 500 m

Photos

Description of the walk

Parking: in Sewen near the church.

(S/E) Return towards the church, then take the road to Lake Alfeld (follow the blue rectangle markings, i.e. the Gr531) to the right of the bridge, then to the left, following the stream, passing Lake Sewen and an oratory.

(1). Continue and pass Lake Alfeld on your left (starting point for hikes).

(2) Continue following the same markings on the right until you reach the crossroads with signposts. There, turn left onto theGR®®5Red Rectangle to head towards Ballon d'Alsace.

(3) Leave theGR®®5trail and follow the yellow and white rectangle markings on the right. Follow the old French-German border and then join a forest path, where you can admire "the large stone".

(4) Continue along this path to the Baraque de Morteville (open shelter available to hikers).

(5) See information in the introduction.
At the intersection, leave this trail and turn left towards the Ballon d'Alsace. Cross the small footbridges.

Turn right onto the Blue Triangle marked path. After 400 m, turn left following the same markings and continue until you reach a forest track at an altitude of 850 m.

(6) Turn left (south-west) onto this track, following the yellow-white-yellow rectangle markings until you reach a sharp right-hand bend in the track.

(7) See information in the introduction.
At the forest track, turn left

Turn right at the same markings, climbing towards La Jumenterie. Further on, leave the markings and continue straight ahead until you reach a crossroads.

(8) Follow a track marked with red discs to the left, heading towards Ballon d'Alsace.

(9) When you reach La Jumenterie, continue on and pass the statue of Joan of Arc

(10) Then pass the Virgin of Ballon d'Alsace.

(11). Follow theGR®®5, Rectangle Rouge, and descend to the Ronde Tête (steep path).

(12) Leave the Anneaux Bleus on your left and continue to the intersection of the red crosses, where you take the left-hand path that passes by Rundkopf.

(13) Continue towards Lake Alfeld (the path on the right also descends to the lake via Boedelen).
The descent to Lake Alfeld is a little steep.

(2) Return via the Blue Rectangle of theGR®®531to Sewen (S/E).

Waypoints

  1. S/E : km 0 - alt. 505 m - Parking: In Sewen near the church - Source de la Doller
  2. 1 : km 0.86 - alt. 502 m - Lac de Sewen
  3. 2 : km 2.89 - alt. 600 m - On the right - Lac d'Alfeld
  4. 3 : km 6.79 - alt. 1,067 m - Leave the GR5 on the right
  5. 4 : km 9.57 - alt. 902 m - Large Stone
  6. 5 : km 10.19 - alt. 839 m - Fork in the road, turn right. Blue Triangle - baraque de morteville
  7. 6 : km 11.62 - alt. 849 m - 3 tracks, on the left. Yellow-White-Yellow Rectangle
  8. 7 : km 12.38 - alt. 899 m - Forest road on the right going up towards La Jumenterie
  9. 8 : km 13.17 - alt. 946 m - Track junction. Red disc
  10. 9 : km 14.03 - alt. 1,075 m - La Jumenterie
  11. 10 : km 14.7 - alt. 1,192 m - Statue of Joan of Arc
  12. 11 : km 15.63 - alt. 1,247 m - Virgin - Ballon d'Alsace
  13. 12 : km 16.45 - alt. 1,092 m - Col de Ronde Tête
  14. 13 : km 17.6 - alt. 1,029 m - Rundkopf viewpoint
  15. S/E : km 22.46 - alt. 505 m - Parking: In Sewen near the church

 Always be cautious and plan ahead when you're outdoors. Visorando and the author of this route cannot be held responsible for any accidents occurring on this route.

The GR® and PR® markings are the intellectual property of the Fédération Française de Randonnée Pédestre.

Reviews and comments

4.4 / 5
Based on 15 reviews

Reliability of the description
4.1 / 5
Ease of following the route
4.5 / 5
Route interest
4.7 / 5
lemarcheur65
lemarcheur65 ★
• Edited:

Hello RafRuns
I agree with you.
I've updated the route, added waypoints, modified the description, etc.
Regarding the IGN (when zooming in) or OSM base maps, which one is accurate?
Because they don't quite match up!

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RafRuns
RafRuns

Overall rating : 4 / 5

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

Many thanks to the creator of this route!
The scenery is magnificent, and with only trails to follow, it was a very beautiful hike!
It was a bit crowded at Ballon and Lake Alfeld, but we expected that given the weather.


I don't understand why the route hasn't been changed on the map since the trail between 5 and 6 is closed (2021...). I download the route onto my watch and don't look at the directions on my phone very much (I find it easier that way), so I found myself in front of the barrier and had to start the route again. OK, it's clearly stated in the introduction to the hike and in the reviews, but I don't learn all that by heart before I set off
The detour is not insignificant, adding about 2.5km and 200m of elevation gain. That may seem like a lot for someone who is already struggling with 20km/1000m.
What's more, I noticed several times that the route doesn't follow the IGN map perfectly, which also causes the watch to give incorrect readings! I had to check my position several times using my phone. It's a shame.

to sum up: a very beautiful, challenging hike with a route that could perhaps be revised slightly to better reflect reality

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FABRICE 68550
FABRICE 68550

Overall rating : 5 / 5

Date of your route : Aug 28, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

nice outing to do

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lemarcheur65
lemarcheur65 ★

Hello Vince M

Thank you for reporting this

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vince M
vince M
• Edited:

Overall rating : 5 / 5

Date of your route : Nov 20, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Varied and attractive. Please note that part of the route between sections 5 and 6 has been closed by municipal order since 2021. The route may need to be modified as I do not think this section will be reopened given its condition and the date of the order.
A detour has been put in place (blue triangle and yellow, white, yellow rectangle at the end). This extends the route by 15-20 minutes and adds 200 m of elevation gain.

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lemouxe
lemouxe

Overall rating : 3 / 5

Date of your route : Jul 07, 2020
Reliability of the description : ★☆☆☆☆ Very disappointing
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Don't rely on the descriptions, which are practically non-existent, because you'll find yourself almost immediately at point 3, the Morteville hut... So, only use the GPS track. When you're not from the area, it's not easy. With all the signposts along the route, it would have been easy to indicate the directions to follow. Otherwise, it's a very beautiful route with lovely views.

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Netra
Netra ★

Hello Laurent, thank you for your comments.

Where did you find errors in the description and, more importantly, what changes should be made to correct them? Thank you in advance.

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pierson.laurent@orange.fr
pierson.laurent@orange.fr

Overall rating : 4 / 5

Date of your route : Aug 23, 2019
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

A few errors in the description

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george pascal
george pascal

Overall rating : 5 / 5

Date of your route : Jun 25, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

very beautiful hike, magnificent views, stunning nature, a must-do at this time of year

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vince68
vince68

Overall rating : 4.3 / 5

Date of your route : Dec 18, 2016
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A few inaccuracies in the description: at the start, follow the blue rectangle to the crossroads before the Isenbach refuge, then take the hairpin bend to the left (blue triangle). My GPS track recorded 23 km. Be careful on the descent. This route is strongly discouraged in snowy or icy conditions. In December, lots of leaves cover the ground, stones and roots, so descend carefully. Otherwise, it's a beautiful route.

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Ramboalsace
Ramboalsace

Overall rating : 4 / 5

Date of your route : Aug 26, 2015
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

Steep climb to La Ronde Tête. After this challenging climb, following the description, we had to descend at least 200 m on the GR5. Then we climbed back up towards Ballon d'Alsace, which we reached via the blue ring, a pretty, picturesque but slightly uneven trail. We stopped for a picnic at the Birkel viewpoint with its superb panoramic view. Then La Jumenterie, Ballon d'Alsace and back via the red X (via Langenberg).
Why return via the Ronde Tête? The path is too steep. When you say "red cross", you actually mean "red trestle" (not to be confused).
This is a long route, only suitable for experienced walkers!

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CHOQUET
CHOQUET

Overall rating : 4.7 / 5

Date of your route : Jul 23, 2015
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

A very pleasant hike, mostly through forest.

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kapsicom
kapsicom

Overall rating : 4.3 / 5

Date of your route : Jun 06, 2015
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

More like 25 km than 20, and the signposting has changed in places, but it's a beautiful walk.
I have the GPS track, just ask for it.

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bryer
bryer

Overall rating : 5 / 5

Date of your route : May 24, 2015
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very beautiful hike.
We discovered the rocks of Morteville.
The hike didn't seem very difficult, except perhaps for the descent from Ronde Tête.
We had to be careful.
A very pleasant day, just the way we like them.

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dalau-bv
dalau-bv

Overall rating : 5 / 5

Date of your route : Oct 17, 2014
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A beautiful hike that is widely accessible to experienced walkers. It took us 8 hours, including breaks. It rained heavily the day before, so the ground was slippery. Please exercise caution in wet weather.

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