Gear is the easy part. These four rules — each from a source that publishes actual numbers, not forum lore — are what keep the day safe. And one line up front: for your dog's specific health, weight-carrying ability, and heat tolerance, check with your veterinarian — this page is gear guidance, not veterinary advice.
1. Know the trail rules before you drive
The National Park Service bans pets from most national park trails and all backcountry in many parks; where dogs are allowed, NPS requires a leash no longer than 6 feet. Its B.A.R.K. Ranger program spells out the standard: Bag waste, Always leash, Respect wildlife, Know where you can go. National forests, BLM land, and most state parks are far more permissive — leashed dogs are generally welcome on trails. Check the specific land manager's page, and note the 6-foot rule when choosing between leash lengths.
2. The pack-weight rule: start at 10%, not 25%
Ruffwear's official guidance for the Approach Pack caps the load at 25% of the dog's body weight including the pack itself, with lighter loads for dogs new to carrying. Treeline Review's testers (updated November 2025) are more conservative: most dogs do best carrying 10–15% of body weight, and only extremely well-conditioned dogs approach 25%. Translation for a 50-lb dog: start around 5–7 lbs — water, kibble, bowl — and build over multiple hikes. Puppies whose growth plates haven't closed, seniors, and dogs with joint issues should carry less or nothing; ask your vet.
3. Paws and heat: the 10-second hand test
The AKC's paw-safety guidance (updated March 2026) cites Journal of the American Medical Association data showing asphalt reaching 135°F when air temperature is just 86°F, and recommends a simple check: press your palm to the surface for 10 seconds — if you can't hold it, your dog can't walk on it. PetMD's summer paw-care guidance adds the practical fixes: hike early morning or evening, favor dirt and grass over pavement and slickrock, and use booties when hot or abrasive surfaces are unavoidable. That is the actual case for the Grip Trex — not fashion, burn prevention.
4. Water math for dogs
PetMD's veterinarian-reviewed baseline is roughly 1 ounce of water per pound of body weight per day — and explicitly more when a dog is hot or exercising, because panting and salivation dump moisture fast. Budget at least half the daily baseline for a half-day hike in mild weather (a 50-lb dog: ~25 oz), and double it in heat. Offer water every 30–45 minutes instead of waiting for flagging or heavy panting, and carry the dog's water — streams run dry, and the pathogens that make backpackers sick affect dogs too. The Approach Pack's saddlebags exist for exactly this cargo.