Welcome to my Hecarim jungle guide! This is my first guide so feedback would be appreciated. I will just get straight to the point, and explain the item build.

Now I have made up many builds that have failed, but this build has really improved my play. I'll explain the reasons behind each purchase.

I start out with;
Boots of speed and three health potions.
Hecarim's passive allows him to gain extra attack damage from movement speed, and the extra speed can help you through the jungle faster. The three potions will help you stay longer in the jungle without having to recall.

Next you'll get;
Trinity Force
You will buy Phage first because this allows your early level ganks to be more efective. Phage will give your auto attacks a chance to slow enemy movement speed. While they're slowed, you can catch up to them because you bought boots first.
Then buy Sheen and then Zeal

After that you will buy;
Warmogs
Buying Warmogs will help you with sustain, allowing you to stay in fights longer and initiate.

Next buy;
Atma's Impaler
This will give you around 45 attack damage, because you Atma's coverts 1.5% of your total health into attack damage. You get the extra health from the Trinity Force and Warmogs.

Then you will buy;
Spirit Visage
This item is great for Hecarim. This will give you Magic Resist, which will make you more tanky. Health which will also make you more tanky, but will grant you more attack damage due to your Atma's. Cooldown Reduction, this will help you get your Rampage or (Q) off faster, for more damage. Then the Unique Passive grants you 15% healing regeneration, this will greatly benifit you because of you W Spirit Of Dread.

The last item;
Randuin's Omen
This is another great item for Hecarim. He gains a from this, because of many reasons. The slowing effects will help out a lot when you are initiating, and the health will be a great addition to your damage from the Atma's.