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Christlessee – Trettach Valley loop from Sonthofen

Routes

Bike touring routes & trails

Christlessee – Trettach Valley loop from Sonthofen

Hard

4.8

(257)

1,127

riders

Christlessee – Trettach Valley loop from Sonthofen

03:44

55.9km

510m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 22, 2026

Tips

Includes a segment in which cycling is not permitted

After 32.3 km for 174 m

Waypoints

Start point

Train Station

Get Directions

2.76 km

View of the mountains behind Oberstdorf

Highlight • Viewpoint

Magnificent view in great weather

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6.69 km

Iller Cycle Path

Highlight • Cycleway

Beautiful cycle path along the Iller

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7.31 km

Fischen im Allgäu is a municipality in the district of Oberallgäu. The main town of the same name is a climatic health resort and the seat of the municipal administration and the Hörnergruppe administrative community.

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7.62 km

Iller Cycle Path near Fischen

Highlight • Cycleway

Very nice bike path along the Iller.

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10.5 km

View of Oberstdorf

Highlight • Viewpoint

This view of Oberstdorf is wonderful - if it wasn't a cross-country ski run, I would suggest a bench to enjoy here

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19.5 km

Christlessee

Highlight • Lake

The Christlesee is crystal clear and beautiful. It is fed by neighboring springs and never freezes over at any time of the year. However, the small lake is too cold for swimming, even in summer. The land above the lake is a water protection area, which is why the lake provides the best drinking water.

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22.4 km

Trettach Valley

Highlight • Gorge

Beautiful mountains. Great mountain views

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24.3 km

View of the Trettach Valley from the wooden bridge

Highlight • Viewpoint

The route across the Trettach leads into the Trettach valley to the beautiful hamlet of Spielmannsau.

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55.9 km

End point

Train Station

Way Types & Surfaces

Way Types

29.9 km

11.7 km

8.58 km

5.46 km

235 m

184 m

Surfaces

28.3 km

22.6 km

3.63 km

856 m

488 m

145 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,010 m)

Lowest point (740 m)

Weather

Saturday 22 August

21°C

5°C

0 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

Comments

August 18, 2025,Tour 72 / 2025 - Entlang der Iller ins Trettachtal und über Rübli und Sonthofen nach Fischen

This was truly a "bike tour" in great weather, with plenty of breaks. Pause and enjoy.

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April 8, 2026,Allgäu: Grandiose Ausblicke im Trettach- und Stillachtal 😲

The "real" paths in the Allgäu, which lead higher into the mountains, are not yet passable, and even the lower-lying forest and meadow paths are still partly covered with snow or ice. Nevertheless, this loop around Fischen, via Rubi into the Trettach Valley and further into the Stillach Valley and on to Oberstdorf, was an ab-so-lu-te joy! The views offered …

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July 17, 2023,Hintere Traufbergalpe

Unfortunately we didn't make it all the way to Alpe due to technical problems.

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July 18, 2024,Sonthofen zur hinteren Traufbergalpe

A great tour, you should be fit as the climbs are sometimes very steep and the descents too. You will be rewarded with a great panorama and a great alpine pasture.

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October 11, 2023,Christlessee – Iller-Radweg bei Fischen Runde von Fischen

Dream tour in dream weather, we started at the free Mühlstrasse parking lot at the Fischen outdoor pool. Via Langenwang, first enjoyed the Iller origins of Trettach, Stillach and Breitach on the Iller. It's something special, the "birth of the Iller". We continue along the wild Trettach to the beautiful Christlessee.
Through Stillachtal past the Fellhornbahn you cycle pleasantly up …

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June 16, 2025,Von Fischen über Oberstdorf zum Freiberg- und Christlsee

Allgäu Day 3 🥾🚲🐄🏞🥰
We got back on our bikes 🚲🚲..... and Bernd "upgraded" at the local bike rental shop 😅
Despite the mediocre weather forecast, the tour remained completely rain-free 🙃. Almost 600 meters of ups and downs..... from Fischen along the mountain over the Burgberg with its beautiful little church.... further along the Trettach River through Oberstdorf and …

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August 20, 2024,Oberstdorf - Alpe Schlappold

Unfortunately, we had to abandon the tour 500 meters before the finish. The technology was no longer working.

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Christlessee – Trettach Valley loop from Sonthofen

View of the mountains behind Oberstdorf

Iller Cycle Path

Fischen im Allgäu

Iller Cycle Path near Fischen

View of Oberstdorf

Christlessee

Trettach Valley

View of the Trettach Valley from the wooden bridge

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