Tom Clynes

What do Florida's Everglades and Alaska's Wrangell-St. Elias have in common? Both face uncertain futures as temperatures rise.

Sharpen your double-bit axe, get your pecs ready for action, and shoulder the biggest pack you've ever seen. Then dive into the trenches with a screwball trailbuilding crew, fixing the neediest hiking paths in the Adirondacks. Assuming you're not afraid of some very heavy lifting, this just might be the ultimate summer job.

Can you see the forest through the trees? Join a bittersweet trek through an old-growth wilderness in its final days.

Here are tons of tree-climbing resources to get you started.