Alistar Runes explained
There's one set of runes for Alistar on patch 13.24 that is the clear favorite for LoL players and pros alike. The best Alistar rune paths on the position 
Support are 
Inspiration as the primary path and 
Sorcery as the secondary path with a pick rate of 53%. Besides picking runes on Alistar you should learn how to play Alistar and if you are interested in pro matches take a look on how a pro builds Alistar. If you want to discuss 
Alistar then you should visit the champion subreddit.
Alistar runes from primary path
Inspiration opens creative opportunities on Alistar troughout the match. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Glacial Augment is the best keystone rune to run on Alistar. This keystone rune slows enemy champion on your first basic attack. This slow can by followed up by a skill shot of Alistar to force the opponent in a dangerous situation. Other primary runes on Alistar are 
Hextech Flashtraption, 
Minion Dematerializer and 
Cosmic Insight.
Having an extra way to decrease the distance with the Hextech Flashtraption will make an engage much easier to pull off. Minion Dematerializer will help you to control the position of the minion wave. Cosmic Insight grants summoner spell and item haste.
Alistar runes from secondary path
When it comes to your secondary path, most Alistar players prefer to go with Sorcery. Sorcery empoweres abilities of Alistar and increases the available champion resources. On the Sorcery path, the best runes for Alistar are Nimbus Cloak and Waterwalking.
Nimbus Cloak, which grants movement speed upon using a summoner spell, works amazingly well with junglers in particular as they take the shortest cooldown summoner spell, Smite. Waterwalking grants movement speed in the river, which helps Alistar get around the map quicker. The extra damage will also help in those all important dragon and baron fights.
FAQ for Alistar Runes
Which is the best keystone rune on Alistar?
The best keystone rune on Alistar is Glacial Augment. This Alistar runes setup is then referred as Alistar Glacial Augment.
What runes does Alistar use?
Runes from the paths Inspiration and Sorcery are the most used runes on Alistar. For the exact pick rates of Alistar runes used, you have to study the rune distribution presented.