Alojz Knafelc was a Slovene mountaineer and the inventor of the Slovenian trail blaze. He was born in 1859 and died in 1937. At first he worked as a drawer for the project of constructing the railway connection between Hrpelje and Kozina. Here he had to take care of different signatures and measurement tables. Several times he recoloured the Aljaž Tower on Triglav. He also wrote the instructions on path-blazing, published in 1922 in the Alpine Gazette (Slovene: Planinski vestnik). The Knafelc blaze (Knafelčeva markacija) has later been used all over Yugoslavia and is prescribed for Slovenia by the 2007 Mountain Paths Act (Zakon o planinskih poteh).
The Knafelc blaze is a white point encircled by a red ring. Its total size should be between 8 in 10 cm, while the relationship between the red and white point in the cross-section should be 1:2. A variant with a yellow point in the center is used for the European long-distance paths E6 and E7. A variant with a green circle around a red circle and a white point in the center is used on the borders of the country.