The single most common way to get hurt on a hike isn't a dramatic fall off a ledge — it's a quick, awkward roll of the ankle on a loose rock or a hidden root. With more than 190 miles of trails in the Ridge to Rivers system right out Boise's back door, that's worth taking seriously before you lace up this summer.
Here in the Treasure Valley, we're lucky. We can be at the Camel's Back trailhead, on Table Rock, or climbing Hull's Gulch within minutes of leaving the house. But those same foothills are steep, dry, and rocky — exactly the terrain that turns a relaxing evening hike into a sprained ankle. As a foot and ankle surgeon who sees these injuries all summer long, I want to help you stay on the trail instead of in my exam room.
Your ankle is a remarkably stable joint on flat ground, but uneven terrain asks a lot of it. Most hiking ankle injuries are lateral ankle sprains — the ankle rolls outward, over-stretching or tearing the ligaments on the outside of the joint. It usually happens in a split second: you step on a rock that shifts, your foot lands at an angle, and your body weight does the rest.
This isn't a rare problem. In one peer-reviewed analysis of fall-related mountain-hiking accidents, the ankle was the most frequently injured body part, accounting for 42% of injuries — more than the knee, wrist, or head. And ankle sprains as a whole are one of the most common musculoskeletal injuries in the country: U.S. emergency departments saw an estimated 7.4 million ankle sprains between 2010 and 2024, with roughly a third tied to athletic activity.
A first ankle sprain that doesn't heal properly is the leading cause of the next one. Repeated sprains can stretch out the ligaments for good, leading to chronic ankle instability — that "my ankle just gives out" feeling. The goal isn't only to avoid pain today; it's to protect the joint for decades of hiking ahead.
The foothills are loose and rocky, and road running shoes simply aren't built for it. Look for trail runners or light hikers with an aggressive, grippy outsole and a firm heel counter (the back of the shoe should not collapse when you pinch it). If you're prone to rolling your ankle or carrying a pack on longer climbs like Bogus Basin Road or the Boise Ridge, a mid-height boot that cups the ankle adds meaningful support.
Tread wears down faster than people expect on abrasive desert terrain. Once the lugs are smooth or the midsole feels packed-out and flat, the shoe has lost the grip and shock absorption that keep your ankle tracking straight. Most hikers should retire trail shoes well before they "look" done.
Poles aren't just for the mountains — on steep, scree-covered descents like the backside of Table Rock, they turn you into a four-point stance and dramatically cut the load on your ankles and knees. Descents are when most ankle rolls happen, because you're moving fast and your foot is landing on terrain you can't fully see.
Strong, well-coordinated ankles resist rolling. Two minutes a day makes a real difference:
Tired, dehydrated muscles get sloppy, and sloppy footwork is how ankles roll. Our summer afternoons routinely top 95°F, so hike early or in the evening, carry more water than you think you need, and turn around before fatigue sets in. Most end-of-hike injuries happen when people push past their energy reserves.
It sounds obvious, but the most common moment of injury is looking up at the view while your feet keep moving downhill. Pause to enjoy the Boise skyline, then watch your foot placement when you're moving — especially on loose gravel and the sandy switchbacks the foothills are famous for.
Pre-existing issues change how you walk and load your feet. Nagging heel pain, a painful bunion, or flat feet that fatigue quickly can all throw off your gait and make a roll more likely. For many active hikers, a pair of custom orthotics improves both comfort and stability on the trail.
Even careful hikers roll an ankle sometimes. For the first 2–3 days, follow the RICE basics:
A mild sprain often settles down within a week or two. But "walk it off" is not always the right call — some injuries that feel like a simple sprain are actually a fracture or a torn ligament that needs proper treatment.
You can't put weight on the foot, the swelling or bruising is severe, the ankle looks deformed, there's numbness, the pain isn't improving after a few days, or this is a repeat injury on the same ankle. Any of these is worth a visit so we can rule out a fracture or ligament tear and get you healing correctly. Learn more about how we treat foot & ankle injuries.
The Boise foothills are one of the best things about living here, and a little preparation keeps them that way. Good footwear, a bit of ankle conditioning, poles on the steep descents, and respect for the heat will prevent the large majority of trail injuries. And if you do roll an ankle — especially if it's not bouncing back, or it keeps happening — don't just tape it and hope. Getting it evaluated early is the surest way to protect your ankle for many summers to come.
Dr. Clark Johnson is a board-certified foot and ankle surgeon at Treasure Valley Foot & Ankle in Meridian, caring for hikers, runners, and active families across the Treasure Valley. If you're dealing with an ankle that won't settle down, request an appointment or call (208) 272-9253 — same-day visits are often available for urgent injuries.
Don't let a stubborn sprain turn into a recurring problem. Let's get you evaluated and back to hiking.