Bear-resistant food storage rules in US wilderness vary by federal agency, state, and even by management zone within a single park. The most strict areas require hard sided canisters by specific approved model. The most permissive allow proper bear hangs. Most fall somewhere in between with soft Ursacks accepted alongside hard canisters. Carrying the wrong food storage into a regulated area results in fines (typically 100 to 500 dollars), permit revocation, and possible evacuation. Here is the region by region rule map for 2026 with the approved storage methods in each.
Why bear canisters exist
Bear canisters became standard because the alternative methods failed. Hanging food in trees works in theory but most backcountry visitors do not hang correctly. Bears in heavily used wilderness (especially the Sierra Nevada) learned to defeat hangs, and the cycle of food rewarding bears created the habituated bear problem that ended with euthanasia of dozens of animals per year in Yosemite alone in the 1980s and 1990s.
Hard canisters solved the problem by removing food access entirely. A bear can roll, sniff, and try to bite a canister but cannot open it. The frustration response leads bears to give up after 10 to 30 minutes and look elsewhere for food. After a few generations of bears growing up without successful raids on canisters, the habituation cycle reset in most managed areas.
The canister requirement spread from Yosemite outward to most heavily used Sierra Nevada wilderness, then to other parks with active bear management issues.
Sierra Nevada (California)
The Sierra Nevada has the strictest canister rules in the country. Hard canisters required:
- Yosemite National Park (entire wilderness, year round)
- Sequoia and Kings Canyon National Parks (most areas, year round)
- Inyo National Forest (bear management areas, including Mt Whitney and most JMT alpine zones)
- Sierra National Forest (most wilderness areas)
- Sequoia National Forest (most wilderness areas)
- Devils Postpile National Monument
Approved canisters for the Sierra in 2026 (from the Sierra Interagency Black Bear Group list):
- Bearikade (all models)
- BearVault BV450, BV475, BV500
- Garcia Backpacker Cache
- Counter Assault Bear Keg
- UDAP No-Fed-Bear
- LightenUP UDAP
Ursack S29.3 and Ursack Major are NOT approved in Yosemite, Sequoia, or Kings Canyon. They ARE approved in Inyo National Forest, Sequoia NF, and most other USFS Sierra wilderness areas (verify with the local ranger district).
Adirondacks (New York)
The eastern High Peaks Wilderness in the Adirondacks requires hard canisters between April 1 and November 30. The western High Peaks and other Adirondack wilderness areas recommend canisters but do not require them.
Approved canisters: most major commercial canisters are accepted (BearVault, Bearikade, Garcia, Counter Assault).
Ursacks are NOT approved in the eastern High Peaks. They are accepted in other Adirondack zones.
North Cascades (Washington)
North Cascades National Park requires hard canisters in some specific zones (Stehekin Valley, some Cascade Pass trip permits, parts of the Pacific Crest Trail through the park). Most of the park accepts proper bear hangs as alternative.
Approved canisters: standard list. Ursacks accepted where canisters are not specifically required.
Olympic National Park (Washington)
Olympic requires hard canisters in subalpine and alpine zones (most areas above 3500 feet). Lower elevation coastal and rainforest zones accept bear hangs as alternative.
Approved canisters: standard list.
Glacier National Park (Montana)
Glacier requires bear resistant food storage in all backcountry campsites. Most established campsites have provided food storage structures (lockers or hang poles), which removes the canister carrying requirement.
For off-trail or non-established camping, canisters are required. Approved list includes major commercial brands.
Grand Teton and Yellowstone National Parks
Both parks require bear resistant food storage. Backcountry campsites in Yellowstone have provided food storage poles or lockers. Where not provided, canisters or properly executed bear hangs are required.
Approved canisters: standard list.
Rocky Mountain National Park (Colorado)
Rocky Mountain NP requires bear canisters at specific campsites in active bear management areas (parts of Wild Basin, Bear Lake area, some east side zones). Most of the park accepts proper bear hangs.
Approved canisters: standard list.
Other Colorado wilderness
Most Colorado wilderness areas (Indian Peaks, Holy Cross, Eagles Nest, Maroon Bells Snowmass) do not require canisters. Black bears are present and active in late summer, so canisters or Ursacks are recommended but not legally required. Proper bear hangs are accepted.
Great Smoky Mountains National Park (Tennessee/North Carolina)
Great Smoky Mountains NP requires food to be hung on provided cables at backcountry shelters and designated campsites. Bear canisters are NOT required but are accepted as alternative.
This is one of the few high-bear-density parks where canisters are not mandatory.
Shenandoah National Park (Virginia)
Shenandoah requires bear resistant food storage in the backcountry. Most popular sites have cable hang systems. Canisters or Ursack Major are accepted.
Big Bend National Park (Texas)
Big Bend requires hard canisters for backcountry permits. Approved canisters: standard list. The black bear population in Big Bend has been growing since reestablishment in the 1990s.
Denali National Park (Alaska)
Denali requires hard canisters with no exceptions. Approved canisters: BRFC (Bear Resistant Food Container) certified models. The park provides loaner canisters with backcountry permits.
Boundary Waters Canoe Area (Minnesota)
The Boundary Waters does not require canisters but strongly recommends them for any trip more than a single night. Black bears are very active in late summer. The provided campsite logs (where present) are not bear resistant.
Approved canister comparison
Common bear canisters in 2026:
- BearVault BV500: 2.7 pounds, 11.5 inches tall, 8.7 inch diameter, 700 cubic inches, approximately 6 to 7 days food capacity, 95 dollars
- BearVault BV475: 2.4 pounds, 9.5 inches tall, 8.7 inch diameter, 565 cubic inches, 5 to 6 days, 90 dollars
- BearVault BV450: 2.1 pounds, 8.7 inches tall, 8.3 inch diameter, 440 cubic inches, 4 days, 85 dollars
- Bearikade Weekender: 1.65 pounds, 10.5 inches tall, 9 inch diameter, 650 cubic inches, 5 to 6 days, 350 dollars
- Bearikade Expedition: 2.4 pounds, 14.5 inches tall, 9 inch diameter, 900 cubic inches, 8 to 9 days, 405 dollars
- Garcia BackPacker Cache: 2.7 pounds, 12 inches tall, 8.8 inch diameter, 614 cubic inches, 5 to 6 days, 80 dollars
Ursack alternatives
Ursack soft canisters use ultra high molecular weight polyethylene fabric that resists bear teeth and claws. Models:
- Ursack S29.3 AllWhite: 7.6 ounces, 650 cubic inches, 90 dollars
- Ursack Major: 7.8 ounces, 650 cubic inches, 90 dollars
- Ursack AllMitey: 13 ounces, 650 cubic inches, includes rodent-resistant Kevlar, 130 dollars
Ursacks must be tied securely to a tree base with a 4 foot tail. Bears can move an untied Ursack and the food inside gets damaged even if not opened.
The Sierra ban on Ursacks dates from incidents in the late 2000s where bears in Yosemite repeatedly defeated early Ursack designs. Current Ursack S29 and Major models have not been re-evaluated for those parks.
Packing strategy
Maximize canister capacity with these practices:
- Repackage food out of original packaging into zip top bags
- Compress and stack flat items (tortillas, cheese, freeze dried meals) at the bottom
- Fill voids with small items (nuts, candy, electrolyte packets)
- Pack the densest highest calorie foods first
- Stove fuel canister can go inside the bear canister (allowed in most parks)
A BV500 efficiently packed holds 6 to 7 days of food for one adult. Inefficiently packed, the same canister holds 4 days.
For more outdoor planning see our leave no trace principles guide and our backpack sizing by trip length guide. Methodology at /methodology.
Frequently asked questions
Are Ursacks legal as alternatives to hard bear canisters?+
It depends on the area. Many National Forest wilderness areas accept Ursacks where bear-resistant food storage is required (Inyo NF, Sequoia NF, parts of the Sierra Nevada). Most National Parks require hard canisters and do not accept Ursacks (Yosemite, Sequoia and Kings Canyon, Olympic, North Cascades for bear management areas, Denali). The Adirondacks and the Boundary Waters have specific rules that vary by zone. Always check the specific permit area before relying on an Ursack.
How much do bear canisters weigh?+
Standard hard canisters weigh 2.5 to 3 pounds empty. The BV450 (Bear Vault) is 2.1 pounds, the BV500 is 2.7 pounds. The Bearikade Weekender (carbon fiber) is 1.65 pounds. The Bearikade Expedition is 2.4 pounds. The Garcia BackPacker Cache (older standard) is 2.7 pounds. Soft Ursack S29.3 is 7.6 ounces and Ursack Major is 7.8 ounces. The weight difference between an Ursack and a hard canister is roughly 2 pounds, which is significant for ultralight trips but worth it in many bear management areas.
How much food fits in a bear canister?+
Roughly 4 to 7 days for one person depending on canister size and packing efficiency. The BV450 fits about 4 days, the BV500 about 6 to 7 days, the Bearikade Expedition about 8 to 9 days. Repackaging food from original packaging into ziplock bags increases capacity by 20 to 30 percent. Compact dense foods (nuts, jerky, hard cheese) pack more efficiently than bulky foods (cereal, cookies, instant noodles).
Do bear canisters work for non-bear animals?+
Yes. Hard canisters are also effective against marmots, raccoons, rodents, ravens, and porcupines. The latches and lid design resist most wildlife. Soft Ursacks are bear resistant but rodents can still chew through over time, so Ursacks should be lined with an aluminum OPSak liner for trips where rodents are a concern. Ravens have been observed defeating older soft canisters in the Sierra Nevada, which is part of why Yosemite requires hard canisters.
Can I just hang my food in a tree instead?+
In many areas yes, but not in bear management areas of the Sierra Nevada, Yosemite, Sequoia, Olympic, North Cascades, or Adirondack high peaks. Bear hangs are increasingly discouraged because most hikers do not hang correctly, and bears have learned to defeat poorly hung bags. The PCT method (counterbalance) and the Inyo standard hang are technically effective but rarely executed well. Where canisters are required, hangs are not legal even if done well.
Alex Patel
Alex Patel writes for The Tested Hub.