Pirin Ultra 66K

66.0km·4200m+

September 12

Bansko Ski Resort,

Bulgaria

source

Set your ITRA PI

Estimated Finish

12:45:31

ITRA PI

Segment Details

1/107

+5.3% · 3.09km · 166m+ · 0m-

1095m930m

0.00km3.09km

Track Category · OSM

Extreme0%

Technical0%

Trail17%

Smooth0%

Road74%

Unknown9%

Road

OSM ↗

highway

residential 33%path 16%tertiary 15%unclassified 12%pedestrian 5%service 5%footway 5%

surface

asphalt 46%sett 8%paving_stones 1%

smoothness

good 12%excellent 7%bad 5%intermediate 4%

lit

yes

area

yes

lanes

oneway

Elevation Profile

1.0×

Trail 78% · Technical 6%Technical 6%

2.9TDI

67.7km

113.1FlatKM

4152m+

4152m−

2655max

929min

1.0×

OSM

Gradient Matrix

Extra

3–10%3.0–5.0km+5.3%165m+3.09km

Uphill

Downhill

>40%

30%

25%

20%

15%

10%

0.5

0.3

0.2

0.3

0.5

Uphill

>40%

30%

25%

20%

15%

10%

0.2

0.3

0.5

10%

15%

20%

25%

30%

>40%

Downhill

Technical sections presentDarker — steeper and longer

Extremes

Gradient Breakdown

44% / 29.9km10% / 6.5km46% / 31.3km

Uphill

>40%×10.2km

30–40%×31.2km

25–30%×62.1km

20–25%×42.2km

15–20%×73.1km

10–15%×129.8km

3–10%×1411.2km

Downhill

30–40%×41.1km

25–30%×31.7km

20–25%×42.1km

15–20%×85.0km

10–15%×108.1km

3–10%×1813.3km

Peaks for this course have not been detected yet.

Skyrunning · ISFSource

ISF technical requirements

Average incline6.1%> 6.0%

Steep sections (30%+)3.8%≥ 5.0%

Max altitude2655 m> 2000 m

Vertical climb4152 m> 1300 m

Asphalt13.6%< 15.0%

UIAA Technical climbing3.2 kmGrade I–II

Possible level

1+23

estimated · high confidence

Level 10/1

Peak reachno detection

Level 22/3

Altitude ≥ 3000 m2655 m

Scrambling3191 m

Rocky footing712 m

Level 30/3

Via ferrata0 m

Glacier0 m

Exposed ridge0 m

About Pirin Ultra 66K

Pirin Ultra 66K is a 66.0 km ultra trail of Pirin Ultra 2025 in Bansko Ski Resort, Bulgaria. The race starts on September 12, 2025. The course climbs 4200 m+ and descends 4152 m−, between a low point of 929 m and a high point of 2655 m. By gradient, 44% of the distance is uphill, 46% downhill and 10% flat. The longest climb runs 8.7 km at an average 11.0% grade (952 m of vertical). The longest descent runs 7.0 km at 15.5% (1078 m of vertical). Surface: 78% trail, 14% road, and 6% technical. Flat-equivalent effort: 113.1 FlatKM.

This page has the interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Pirin Ultra 66K.

Other distances of Pirin Ultra 2025Pirin Ultra 160K (160 km)·Pirin Extreme 38K (38.0 km)·Pirin Trail 25K (25.0 km)

Official websitewww.pirinultra.com/en