Bozeman Mountain Works raises (lowers?) the bar with the Stealth 0 Nano Tarp: 4.4 oz for a 6x8 shelter, shown here in Pebble Creek's morning light.
In Yellowstone, you almost never have to carry water. Even in dry years, there are so many creeks, streams, ponds, and springs flowing that water weight is almost never carried - unless you approach it (errantly) from the insurance mentality of a traditional backpacker.
Big meadows and blue creeks in expansive valleys surrounding by tall peaks: the character of Yellowstone's northeast corner.
12 ounces of fishing gear used judiciously and successfully means reducing food weight on a long trek. This strategy saved me the weight of 54 ounces over the course of this 9-day trek.
Not many people see this one. It's too far from a road for the casual backpacker and on a trail so remote that 90+% of its users are horse packing hunters and grizzly bears. But it's worth the walk don't you think? The beauty of an ultralight pack: finding places like this are a piece of cake.
Most so-called experts ridicule cookfire-building as a skill for eccentrics and western horsemen (not necessarily mutually exclusive groups), given that alcohol stoves now weigh less than an ounce and canister stoves less than three. But a cookfire crafted to boil only a pint of water in a small mug is cheap, easy, fast, and yep: ultralight.
Tarp camping is a lost art. The advent of lightweight tents in the 1960s pretty much ruined it for the next few generations. This rig restores the style at a ridiculously light weight. A 4.4 oz tarp and 4.0 oz breathable bivy sack, combined with an ounce and a half of titanium tent stakes and Spectra guylines means that you get plenty of storm protection at a weight less than the nylon footprint of most three season tents.