The Skirmisher ability Stags Leap is:
Stags Leap: As a free action, the Ranger can attempt a running jump without moving 10 feet before the jump.
This is a 10 ft pounce but I am wondering if it is possible to jump as well and still get the full attack.
I checked the Acrobatic page and found:
An Acrobatics check is made as part of another action or as a reaction to a situation.
Additionally the Skirmisher Ability Surprise Shift gives you an additional 5ft movement as a swift action
Surprise Shift (Ex): The Ranger can move 5 feet as a swift action. This movement does not provoke attacks of opportunity and does not count as a 5-foot step.
So, is it possible to use Stags Leap to move 10ft as a free action, Surprise Shift as a swift action, additionally jump e.g. 20ft (DC 20) and use Lunge to get a 40ft, still being able to perform a full round action?