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Germany

Baden-Württemberg

Landkreis Reutlingen

Dettingen an der Erms

Hell Holes Dettingen – Yellow Rock Viewpoint loop from Dettingen Erms Freibad

Routes

Hiking trails & Routes

Germany

Baden-Württemberg

Landkreis Reutlingen

Dettingen an der Erms

Hell Holes Dettingen – Yellow Rock Viewpoint loop from Dettingen Erms Freibad

Hard

4.8

(37)

159

hikers

Hell Holes Dettingen – Yellow Rock Viewpoint loop from Dettingen Erms Freibad

04:48

15.3km

560m

Hiking

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is accessible with public transport.

Last updated: March 20, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 4.31 km for 93 m

Waypoints

Start point

Train Station

Get Directions

962 m

View of Calverbühl

Highlight • Natural Monument

The Calverbühl (also Calver Bühl, formerly Karpfenbühl) is a striking 509 m above sea level elevation south of Dettingen an der Erms in the district of Reutlingen. On the summit of the Calverbühl there is a linden tree that is clearly visible from afar. Until the Reformation in 1534 there was a chapel up here. The Calverbühl Chapel was a regular destination for the people of Dettingen on St. Mark's Day (April 25th) for a pilgrimage.
The Calverbühl is a small volcanic vent of the Swabian Volcano. The rock is characterized by numerous lapilli. Geophysical measurements have shown that a strong geomagnetic anomaly occurs on the Calverbühl, which is caused by the ferromagnetic minerals (especially magnetite) present within the volcanic rock.
In a recent publication, Otto Mäussnest mentions that the magnetism of the Calverbühl was increased by lightning strikes. The Calverbühl with the lime tree on the summit and the semi-dry grassland on the slopes is a protected natural monument and is also protected as a geotope under the name Calverbühl, about 1000 m south of Dettingen a. d. Erms on the western slope of the Ermstal. It is embedded in both the Reutlinger and Uracher Alb landscape conservation area and the Swabian Alb biosphere reserve.

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Tip by

1.27 km

Calverbühl Hill with the Linden Tree

Highlight • Viewpoint

Coming from the Hauserbrunnen fountain, the first thing you see is a mighty green rock topped with a particularly beautiful tree. Climbing up, you'll find a great bench around the tree with fantastic views over the cherry trees and the valley.

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3.11 km

Hell Holes Dettingen

Highlight • Gorge

At the Höllenlöcher, you can experience the erosion of the Swabian Jura up close. The Albtrauf is constantly moving further south, partly slowly and partly suddenly in massive rockfalls. Here you can see this erosion through fresh fracture edges in the rocks. Fascinating and adventurous!

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4.33 km

Yellow Rock Viewpoint

Highlight • Viewpoint

Great view towards Bad Urach. A short ridge walk is required to reach the rock.

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Tip by

7.01 km

St. Johann Foal Farm

Highlight • Structure

The Gestüthof St. Johann and the associated Fohlenhof is specialized in foal breeding as part of the main and state stud Marbach.

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Tip by

7.56 km

Tree-lined avenue at the stud farm in the Swabian Alb Geopark

Highlight • Trail

nice stretch of path with trees

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9.42 km

Hohe Warte Observation Tower and War Memorial

Highlight • Monument

Directly on the Albsteig lies the 820-meter-high mountain "Hohe Warte". On the highest point of the Hohe Warte, there is a viewing tower with a height of 23 meters. The tower was built and inaugurated in 1923, after a high seat and then a viewing scaffold had previously been located at the site. The tower was erected in honor of the fallen of the First World War.

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10.7 km

Längental Sinkhole Valley

Highlight (Segment) • Natural Monument

The Längenental is by no means a valley, but a 300 m wide and 1.5 km long valley interspersed with sinkholes and without a surface on the surface.

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Tip by

15.3 km

End point

Train Station

Way Types & Surfaces

Way Types

7.79 km

5.75 km

984 m

463 m

224 m

< 100 m

Surfaces

6.85 km

4.94 km

2.32 km

1.08 km

< 100 m

Elevation

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

Highest point (810 m)

Lowest point (410 m)

Weather

Tuesday 26 May

28°C

13°C

14 %

Additional weather tips

Max wind speed: 10.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Hell Holes Dettingen – Yellow Rock Viewpoint loop from Dettingen Erms Freibad

View of Calverbühl

Calverbühl Hill with the Linden Tree

Hell Holes Dettingen

Yellow Rock Viewpoint

St. Johann Foal Farm

Tree-lined avenue at the stud farm in the Swabian Alb Geopark

Hohe Warte Observation Tower and War Memorial

Längental Sinkhole Valley

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