Troutbeck Tongue is a small fell in the English Lake District, three miles (five kilometres) ENE of Ambleside.

The character of this side is in marked contrast to the southern tip of the fell, which drops steeply over rocky outcrops to Troutbeck Park.

From the village it is a pleasant walk to the base of the fell, following the course of the Trout Beck along Ing Lane which leads to Troutbeck Park Farm.

This 1,900 acre (7.7 km2) sheep farm was bought by the children's book author and illustrator Beatrix Potter in 1923; it was in danger of development and so she decided to purchase it.

It is quite a steep climb with several rocky outcrops and walls and fences to negotiate, but the modest height of the fell makes it a short ascent of less than 30 minutes.