Key takeaways
- Ultralight backpacking minimizes pack weight to travel farther and more comfortably.
- It's measured by base weight (pack minus food, water, fuel): ultralight ≈ under 10 lb, SUL under 5 lb.
- Biggest gains come from the 'Big Three' — pack, shelter, and sleep system.
- Cut weight without cutting safety: keep the Ten Essentials and adequate insulation.
What ultralight backpacking is
Ultralight backpacking is the philosophy of minimizing pack weight to travel farther, faster, and more comfortably with less wear on the body. It’s measured by base weight — the weight of your loaded pack minus consumables (food, water, fuel):
- Lightweight — base weight under ~20 lb.
- Ultralight (UL) — under ~10 lb.
- Super ultralight (SUL) — under ~5 lb.
How to go lighter
The biggest gains come from the Big Three — pack, shelter, and sleep system — since they’re the heaviest items. Weigh everything, cut duplicates and ‘just in case’ gear, and invest in a few key light items (often using materials like Dyneema). Lighter gear also lets you carry a smaller, lighter pack.
A backpacker drops from a 28 lb to a 12 lb base weight mostly by replacing the Big Three — a frameless pack, a trekking-pole tarp shelter, and a quilt with a light pad — then trims small items, finishing trips far fresher.
Light, not ‘stupid light’
Done right, ultralight is safe: it trims redundancy, not safety. Keep the Ten Essentials, adequate insulation, and shelter for the conditions. Cutting essentials to hit a number — going ‘stupid light’ for the weather — is the trap to avoid. It’s the logical extension of backpacking weight management.
The bottom line
Ultralight backpacking is about carrying less to enjoy more — tracking base weight and attacking the Big Three first to shed pounds that make every mile easier. Done well, it's both comfortable and safe, because it cuts redundancy rather than essentials. The discipline is shaving weight without ever crossing into 'stupid light' for the conditions.
Frequently asked questions
What counts as ultralight backpacking?
Ultralight is usually defined by base weight — the weight of your loaded pack minus consumables like food, water, and fuel. A base weight under about 10 pounds is commonly considered ultralight, under 20 is 'lightweight', and under 5 is 'super ultralight (SUL)'. The exact numbers are guidelines, not strict rules.
How do you reduce pack weight the most?
Start with the 'Big Three' — your backpack, shelter, and sleep system — because they're the heaviest items and offer the biggest savings. From there, trim consumables and the many small items, weigh everything, and cut duplicates and 'just in case' gear, while keeping essentials. Spending on a few key lightweight items often yields the largest gains.
Is ultralight backpacking safe?
It can be very safe, but only if you cut weight intelligently. Ultralight done right keeps the Ten Essentials, adequate insulation and shelter for the conditions, and a margin for emergencies — it trims redundancy and excess, not safety. Going too light for the conditions (the 'stupid light' trap) is where it becomes dangerous.
Sources
- Lightweight backpacking — American Hiking Society
- Backcountry skills — The Mountaineers