Rocky Mountain National Park · National Park Service
Is the Ursack Major legal in Rocky Mountain National Park?
Not legal
No. The Ursack Major is a soft-sided bag, and Rocky Mountain National Park requires a hard-sided or rigid container.
Hard-sided, lockable, commercially made canister required for wilderness overnight camping; hanging not permitted. Area text names no approved list. Soft-sided bag is not a rigid canister (order/regulation requires a canister or non-pliable container).
Heads-up before you rely on this
- Partly verified. Some part of this rule (a date, a boundary, a list or a wording detail) is not fully confirmed from official text. See the notes below for what is missing.
Rules change. Confirm with the land manager (links below) before you go.
What this means
The written rule asks for a hard-sided, solid or non-pliable container but names no approved list. A commercially made hard canister that is on a recognised list should meet the standard; a soft bag does not.
About this model. Soft-sided; IGBC-certified but not allowed where a hard-sided canister is required (e.g.
The rule in Rocky Mountain National Park
- Requirement
- Hard-sided, lockable, commercially made canister required for wilderness overnight camping; hanging not permitted.
- Accepted
- No named list: 'hard-sided, lockable, commercially made' (no IGBC/SIBBG reference found on fetched pages)
- Dates
- Overnight page says all wilderness overnights; park guide says Apr 1 - Oct 31 below treeline / Longs Peak Boulder Field (winter applicability needs verification)
- Source updated
- 2026-08-28
- Checked
- 2026-10-26 · partly verified
- Our notes
- Season wording differs between pages.
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 Rocky Mountain National Park
| Canister | Verdict | Weight | Volume |
|---|---|---|---|
| BearVault BV ONE Adjustable | Likely legal | 1 lb 15 oz (895 g) | 8.3 expanded / 4.65 collapsed L |
| BearVault BV425 Sprint | Likely legal | 1 lb 12 oz | 5 L |
| BearVault BV450 Jaunt | Likely legal | 2 lb 1 oz | 7.2 L |
| BearVault BV475 Trek | Likely legal | 2 lb 4 oz | 9.3 L |
| BearVault BV500 Journey | Likely legal | 2 lb 9 oz (1.16 kg) | 11.5 L |
| Grub Can Wave 6.6 L | Likely legal | 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
- Weminuche Wilderness No canister order found; store food properly. 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
- Sequoia & Kings Canyon NPs - Pear & Emerald Lakes Canister required in the Pear and Emerald Lakes areas. Not legal
- Sequoia & Kings Canyon NPs - Rae Lakes Loop Canister required in the Rae Lakes Loop. Not legal
Quick answers
Is the Ursack Major legal in Rocky Mountain National Park?
No. The Ursack Major is a soft-sided bag, and Rocky Mountain National Park requires a hard-sided or rigid container. Hard-sided, lockable, commercially made canister required for wilderness overnight camping; hanging not permitted. Area text names no approved list. Soft-sided bag is not a rigid canister (order/regulation requires a canister or non-pliable container).
What does Rocky Mountain National Park require for food storage?
Hard-sided, lockable, commercially made canister required for wilderness overnight camping; hanging not permitted. Accepted standard: No named list: 'hard-sided, lockable, commercially made' (no IGBC/SIBBG reference found on fetched pages).
How current is this answer?
We checked Rocky Mountain National Park's official source on 2026-10-26. Partly verified. 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.