You should only go to the source of the Isar River or the Kastenalm by bike. Walking on the sunny forest road is a miserable slog, especially in summer.

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Wolfgang Ruf

July 6, 2025

Mountain biking

Beautiful path to the Isar springs

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Mike Fox

August 24, 2025

Mountain biking

Here the young wild river is developing into a full-grown river

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Best routes to Isar headwaters

4.9

(43)

185

riders

1. Source of the Isar – Isar headwaters loop from Mittenwald

64.6km

04:25

930m

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

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Hard

4.8

(72)

324

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2. Isar headwaters – Stone Cairns on the Isar loop from Scharnitz

21.1km

01:20

230m

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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Easy

4.8

(140)

542

riders

3. Isar headwaters – Access to the source of the Isar loop from Seefeld in Tirol

49.3km

03:13

560m

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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Moderate

Details

Informations

Elevation 1,050 m

Weather

Friday 6 February

1°C

-4°C

0 %

Additional weather tips

Max wind speed: 3.0 km/h

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Location: Scharnitz, Region Seefeld – Tirols Hochplateau, Bezirk Innsbruck-Land, Tyrol, Austria

Other Popular Places to Check Out

Gleirschklamm

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Blick in die Gleirschbachklamm

Isar Cycle Path Through the Karwendel Valley

Isar River Source (Isarursprung) in Hinterautal

Bridge in Gleirschklamm

Isar River in Karwendel Nature Park

Isar headwaters

1. Source of the Isar – Isar headwaters loop from Mittenwald

2. Isar headwaters – Stone Cairns on the Isar loop from Scharnitz

3. Isar headwaters – Access to the source of the Isar loop from Seefeld in Tirol

Other Popular Places to Check Out

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