Yellowstone National Park · National Park Service
Is the Ursack Major legal in Yellowstone National Park?
Not legal
No. The Ursack Major is a soft-sided bag, and Yellowstone National Park requires a hard-sided or rigid container.
Canister not required: food-pole hang or IGBC hard-sided container; soft-sided containers not allowed. IGBC-certified but soft-sided; this area requires a hard-sided container.
Heads-up before you rely on this
Rules change. Confirm with the land manager (links below) before you go.
What this means
This area accepts IGBC-certified hard-sided containers. Soft-sided bags do not qualify here, even when they carry IGBC certification.
Reading note. Yellowstone National Park does not require a canister. The verdict describes whether this model would count as an accepted container if you choose to use one as your food storage.
About this model. Soft-sided; IGBC-certified but not allowed where a hard-sided canister is required (e.g.
The rule in Yellowstone National Park
- Requirement
- Canister not required: food-pole hang or IGBC hard-sided container; soft-sided containers not allowed.
- Accepted
- IGBC hard-sided container (soft-sided not allowed)
- Dates
- Per page
- Source updated
- 2025-04-24
- Checked
- 2026-10-26 · verified
About the Ursack Major
- Volume
- 10.65 L
- Weight
- 7.6 oz
- Material
- UHMWPE/Spectra fabric
- IGBC certified
- Yes (cert. 3738)
- On Yosemite / SEKI list
- No
- On Olympic list
- No
- Spec source
- search summary of ursack.com pages
Specs come from the sources named in "Spec source" and many are incomplete. See every area where the Ursack Major is accepted or not →
What else works in Yellowstone National Park
| Canister | Verdict | Weight | Volume |
|---|---|---|---|
| BearVault BV ONE Adjustable | Allowed, not required | 1 lb 15 oz (895 g) | 8.3 expanded / 4.65 collapsed L |
| BearVault BV425 Sprint | Allowed, not required | 1 lb 12 oz | 5 L |
| BearVault BV450 Jaunt | Allowed, not required | 2 lb 1 oz | 7.2 L |
| BearVault BV475 Trek | Allowed, not required | 2 lb 4 oz | 9.3 L |
| BearVault BV500 Journey | Allowed, not required | 2 lb 9 oz (1.16 kg) | 11.5 L |
| Grub Can Wave 6.6 L | Allowed, not required | 1 lb 15 oz | 6.6 L |
The Ursack Major under nearby rules
- Mount Rainier National Park Hang or use food-storage poles; canister highly recommended in sub-alpine areas, not required. No canister rule
- Big Bend National Park Bear boxes/lockers; a bear-resistant container (300 ft-lb standard) is required only for caching. No canister rule
- Great Smoky Mountains National Park Food must be hung on provided cable systems; canisters not required. No canister rule
- Grand Teton National Park IGBC-approved bear canister required in the backcountry (free loan available). Verify first
- Rocky Mountain National Park Hard-sided, lockable, commercially made canister required for wilderness overnight camping; hanging not permit… Not legal
- Sequoia & Kings Canyon NPs - Pear & Emerald Lakes Canister required in the Pear and Emerald Lakes areas. Not legal
Quick answers
Is the Ursack Major legal in Yellowstone National Park?
No. The Ursack Major is a soft-sided bag, and Yellowstone National Park requires a hard-sided or rigid container. Canister not required: food-pole hang or IGBC hard-sided container; soft-sided containers not allowed. IGBC-certified but soft-sided; this area requires a hard-sided container.
What does Yellowstone National Park require for food storage?
Canister not required: food-pole hang or IGBC hard-sided container; soft-sided containers not allowed. Accepted standard: IGBC hard-sided container (soft-sided not allowed).
How current is this answer?
We checked Yellowstone National Park's official source on 2026-10-26. Rules change, so confirm with the land manager before you go.
Sources and date checked
Checked . We link the official pages so you can read the rule yourself.