Runes :
Quins: AttackDamage
Marks: AttackDamage
Seals: AttackSpeed
Glyphs: AttackSpeed
Explaination: For Jungle Udyr, You need attack speed so probably get those runes are the best, Armorpen isn't a need it's because your Tiger/Q Scales on Attackdamage so it's better
Masteries:
0/21/9
Explaination: You have lots of damage already, now you need is Defense. So 0/21/9 Is the best. Make sure to take the Tough Skin & Bladed Armor in the defense tree & take Swiftness in utility tree
Item Build:
Boots, Wriggles, Wits end, MercuryThreads/NinjaTabi, Gracial Shroud, Negatron Cloak, Triforce
Jungle Route:
If you wanna gank more start with 1 boots and 3 pots.
If you wanna sustain more start with Cloth armor and 5 pots.
Get a good leash at Blue, ask them damage and help with wolves. and go
Wolves > Blue > Wraiths > Gank
Or
Wolves > Blue > Wraiths > Double Golems > Red > Heal > Gank
Skill Build :
Always max Tiger because it's your bread and butter.
Q > W > Q > E
then max Q follow by W and then E, And of course R will be your last.
Combo:
Q > E > W > Q
As you know Udyr can change stances and the stances will still have the dot. So if you tiger and just to bear and exactly hit the another champion on the dot. They will get stunned as well as GET THE TIGER'S MAGIC DAMAGE. It deals lots of damage as well as CC.
GoodLuck For Your Jungle Udyr [:
But i don't main him in jungle.