Koloon Bastak (Daryook) rock glacier

Koloon Bastak (Daryook) rock glacier

Page Type Page Type: Mountain/Rock
Location Lat/Lon: 36.05921°N / 51.47363°E
Additional Information County: Tehran
Activities Activities: Hiking, Mountaineering
Seasons Season: Spring, Summer, Fall, Winter
Additional Information Elevation: 12303 ft / 3750 m
Sign the Climber's Log


Koloon Bastak glacier (Daryook glacier) is a rock glacier on the north face of Mt. Koloon Bastak in the northern part of the province of Tehran. The easy access to Mt. Koloon Bastak makes it one of the most popular and most crowded 4000m peaks of the Alborz range.

The fact that you can drive up to the elevation of 3400m to start your hike, makes your hiking trip to the summit very short. It takes you only about 2 hours to get to the summit of Koloonbastak from where you park your car. You can usually park your car at a parking lot next to a transmitter station (Mokhaberat station) at 3400m. If you go on Friday there is a chance that the parking lot is full. In that case you will have to park your car at the upper parking lot of the Dizin ski resort at 3250m.

Koloonbastak glacier may not be noticeable in fall, winter and spring because the area is covered with snow. However, in the summer you can clearly see it. In 2014/2015 the Alborz range experienced a new record low snowfall, and the fact that the summer was very hot, it makes the snow cover unbelievably low.

The top of the glacier is at 3750m and the bottom of the glacier is at 3650m. There is a lake at the bottom of the glacier called Daryook lake (Koloon Bastak lake).

Here are some pictures I took on my way to this place:

The starting point
The starting point

Mt. Sechal
Mt. Sehchal

On the way up
Mt. Koloon Bastak

Mt. Koloon Bastak
Mt. Koloon Bastak

Koloon Bastak summit
The summit

Here are some photos from the summit of Mt. Koloon Bastak:

Dizin ski area
Dizin ski area

Mt. Tochal
Mt. Tochal

Mehrchal and Abak
Mt. Mehrchal and Mt. Abak

Mt. DamavandMt. Damavand and Mt. Sarakchal

Damavand and Kholeno
Kholeno massif

Azad kooh and Kaman kooh
Azad kooh and Kaman kooh

Azad kooh, Kaman kooh and Varvasht
Sorkhab and Varvasht

Alamkooh massif

Garchan, Haftkhan, Naz and Kahar
Garchan and Haftkhan

From the summit of Mt. Koloon Bastak you can hike down to the ENE, and after about 300m you can see a rock glacier called Daryook or Koloon Bastak glacier. Here are some photos:

Daryook rock glacier
Daryook glacier

Daryook Valley and Daryook glacier
Damavand and Daryook glacier

Daryook lake
Daryook lake

Another view
another view

Getting There

To get to this area you can go to Shemshak and take Shemshak-Dizin Road. Just before you get to the upper parking lot of Dizin ski resort there is a dirt road to the right. Take that road and go to the parking space at the transmitter station. 


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Red Tape

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When to Climb

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External Links

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Additions and CorrectionsPost an Addition or Correction

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hgrapid - Aug 30, 2015 1:25 am - Hasn't voted

Coordinates are off

The interactive map shows your mountain in the middle of the Atlantic Ocean. You may want to revise the coordinates.


kamran - Aug 30, 2015 8:03 am - Hasn't voted

Re: Coordinates are off

Thanks. I fixed it. The difference was a negative sign for the longitude.

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