Coming Down the Mountain

I completed the jousting quests and then appeared to be stuck on 72 / 115 with no follow ups.

After flyign around I found a quest called "last Stand at Whistling Grove" located at 19,40. This got me back on track and may help others in this predicament.

dtm, Aszune
dtmfive

Guide to Mount Hyjal Quests (Alliance), part 1:

Some optional initial quests:
Hero's Call
As Hyjal Burns
The Earth Rises
Inciting the Elements and Flames from Above

Required chain:
Protect the World Tree (unlocks optional War on the Twilight's Hammer)
The Flameseer's Staff
Flamebreaker
The Return of Baron Geddon
Emerald Allies
The Captured Scout
Twilight Captivity
Return to Alysra
A Prisoner of Interest
Through the Dream
Return to Nodrassil

At this point, you must awaken three ancients. A Vision of Ysera will appear after each. You must awaken Goldrinn before beginning the Aessina/Tortolla quests but can otherwise work on them in any order.

Goldrinn Quests:
The Return of the Ancients (enables optional Harrying the Hunters and In the Rear with the Gear)
End of the Supply Line
The Voice of Goldrinn
Goldrinn's Ferocity
Lycanthoth the Corruptor enables several optional quest chains:

• The Shrine Reclaimed (optional but do it now if you are are going to do it)
• 
  
• Gar'gol's Gotta Go and Get Me Outta Here!
• 
  
• From the Mouth of Madness and Free Your Mind, the Rest Follows
• 
  
• The Eye of Twilight, Mastering Puppets, Elementary!, and Return to Duskwhisper
• 
  

Cleaning House (enables optional Sweeping the Shelf)
Lightning in a Bottle (enables optional Into the Maw! / Into the Maw!)
Rage of the Wolf Ancient, Forged of Shadow and Flame, and Crushing the Cores
Cindermaul, the Portal Master
Forgemaster Pyrendius
Return from the Firelands [vision of Ysera]

Aviana Quests:
(optional linking quests ofWings over Mount Hyjal or Aviana's Legacy)
Two chains:
* An Offering for Aviana, A Plea from Beyond, and A Prayer and a Wing
* The Wormwing problem, Scrambling for Eggs, and then A Bird in Hand

Next comes Fact-Finding Mission which enables these required quests:

• 
  
• Setheria's Brood
• 
  
• A Gap in Their Armor and Disassembly
• 
  
• The Codex of Shadows [from here ] leads to Egg Hunt
• 
  

Finish the above for
Sethria's Demise
Return to the Shrine
An Ancient Reborn [Vision of Ysera]

Optional bonus chain:
The Hatchery Must Burn
Flight in the Firelands
Wave One
Wave Two
Egg Wave [gives Beware of the 'Unbeatable?' Pterodacyl and choice of Gold Mini Jouster or Blue Mini Jouster]
Return to Aviana

Aessina/Tortolla Quests (must do Goldrinn first)
The Fires of Mount Hyjal (optional)
Save the Wee Animals and Oh, Deer!
Fighing Fire With ... Anything (optional, but must complete before Aessina's Miracle)
Disrupting the Rituals
If you're Not Against Us...
Seeds of Their Demise
A New Master
The Name Never Spoken
Black Heart of Flame
Good News... and Bad News (auto-accepted; can not be obtained later)
Last Stand at Whistling Grove
The Bears Up There (a good time to do Bounce!)
Smashing Through Ashes enables additional required quests:

• Durable Seeds
• 
  
• Firebreak and Prepping the Soil

Fresh Bait
Hell's Shells
Tortolla Speaks
An Ancient Awakens [Vision after all chains].

After waking all the ancients, the third vision of Ysera gives The Last Living Lorekeepe

If you quit questing after getting this achievement, you will miss the most epic part of the zone.

There's a grand total of 133 quests in Mount Hyjal, ending with the epic retreat of Ragnaros at the hands of Cenarius, Malfurion, Runetotem and me :p. Its follow up leads you back to Orgrimmar or Stormwind respectively, for the follow up to the Maelstrom.