Beware! There are trolls who've picked up a few magic items along the way. They're likely to be aided by a few friends as well.

Male Troll Barbarian 3 (CR 7)

Large Humanoid (Giant)
Init +3; Senses Low-Light Vision, Scent; Perception +12

AC 22, touch 13, flat-footed 19 (+4 armor, +3 Dex, -1 size, +5 natural, +1 deflection)
hp 118 (3d12+6d8+72); Regeneration 5
Fort +16, Ref +6, Will +5
Defensive Abilities Trap Sense +1, Uncanny Dodge; Resist fire 10

Speed 40 ft.
Melee Bite (Troll) +12 (1d8+6), Claw x2 (Troll) +12 x2 (1d6+6) and Rend x2 (Troll) +12 x2 (1d6+9)
Space 10 ft.; Reach 10 ft.

Str 23, Dex 16, Con 26, Int 8, Wis 10, Cha 10
Base Atk +6/+1; CMB +14; CMD 28
Feats Cleave, Intimidating Prowess, Iron Will, Power Attack +4/-2, Skill Focus: Perception
Skills Acrobatics +1, Climb +4, Escape Artist +1, Fly -1, Intimidate +17, Perception +12, Ride +1, Sense Motive +2, Stealth -3, Survival +5, Swim +4
Languages Giant
SQ Fast Movement (Ex), Knockback (Ex), Rage (16 rounds/day) (Ex)
Combat Gear Chain Shirt; Other Gear Ring of Fire Resistance, Minor, Ring of Protection, +1

Cleave If you hit your first target, attack an adjacent target at the same attack bonus in exchange for -2 AC.
Damage Resistance, Fire (10) You have the specified Damage Resistance against Fire attacks.
Fast Movement (Ex) +10 feet to speed, unless heavily loaded.
Knockback (Ex) While raging, bull rush in place of an attack.
Low-Light Vision See twice as far as a human in low light, distinguishing color and detail.
Power Attack +4/-2 You can subtract from your attack roll to add to your damage.
Rage (16 rounds/day) (Ex) +4 Str, +4 Con, +2 to Will saves, -2 to AC when enraged.
Regeneration 5 Heal HP quickly and cannot die.
Scent (Ex) Detect opponents within 15+ feet by sense of smell.
Trap Sense +1 (Ex) +1 bonus on reflex saves and AC against traps.
Uncanny Dodge (Ex) Retain Dex bonus to AC when flat-footed.