The Tronåsen is a col with a length of 1.4 kilometer. This is a category 3 col. It is located in Moi, Rogaland, Norway. The average grade of this col is 15.4% with a maximum of 21.3%. The Tronåsen ascents from 72 meter at the start, to 281 meter at the top, with a total of 209 ascending meters.
|Elevation gain||209 m|
|Average grade||15.4 %|
|Maximum grade||21.3 %|
|Minimum elevation||72 m|
|Maximum elevation||281 m|
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Tronåsen is the ancient road between Moi and Flekkefjord. It is today a protected route. The road ends at Bakke Bro (bridge), an old suspension bridge from 1844 crossing the river Sira. The Tronåsen route is part of the old Western main road and has eight sharp turns from Tronvik to the county border, and three sharp curves down in the county of Vest-Agder. The road was said to be one of the most dangerous stretches during the Rally Monte Carlo in 1931. The road is narrow only 2,5 - 3,5 m wide and very steep. On this protected route every five years they organize a popular veteran car rally race.
The Tronåsen road is open for small cars during the summer and is the oneway road from Tronvik to Sira.