Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is the first build that i haved posted here. I have been playing this build for awhile and been having alot of success with it.
I use Heal/Ghost as my 2 summoner spells i take heal because Garen does not have that much hp this will help survive and stay in the lanes longer. Ghost is for quick getaways/ catching.
First i take Doran's Blade for the extra health, attack damage, and little life steal you receive. This will let you lane much longer with ease. Also there to help you stay in the lane as long as possible is the health potion.
Next i would take Boots of Swiftness, Garen does not have great escaping skills so you will need all the speed you can get for chasing and getting away from your enemies.
From there i go after infinity Edge, with its boost in attack damage and the increase in your crit damage it will make garens Judgment a very powerful move.
Next get the sword of occult, When you get the sword you will want to try to build the stacks the best that you can, if you hit 20 stacks you will get 100 attack damage bonus which will make garen hit very hard.
Youmuu's ghostblade would be the next item that you should get. Its attack damage and crit are nice but the passive and active effects are what you are getting it for. The passive gives you great armor pen and the cooldown reduction is very nice for Garen. Then the active will give you more movement and attack damage making him deal great damage and very quickly.
Then you should go for Last Whisper again you get it for the attack speed and the great armor pen.
Last you should get sunfire cape Garen does not have a lot of Hp so this should help keep you alive and the added in damage from the cape is very nice also.