Yosemite National Park is full of jaw-dropping moments, from gazing up at El Capitan to climbing to the top of Half Dome or driving over Tioga Pass. With elevations ranging from just over 2,000 feet along the Merced River to more than 13,000 feet at Mount Lyell, it’s helpful to understand how Yosemite’s altitude might affect your energy levels, especially if you’re coming from sea level. The good news? Most travelers experience nothing more than mild breathlessness on hikes, and a few simple tips can keep you feeling your best. Let’s get into how to prepare so you can make the most of your Yosemite adventures.
What is Altitude Sickness?
Altitude sickness happens when the body adjusts to lower oxygen levels at higher elevations, typically above 8,000 feet. Symptoms like headaches, nausea, fatigue, dizziness, or shortness of breath can appear within 6-24 hours but usually fade as the body acclimates. Staying hydrated, taking it easy upon arrival, and being in good physical condition can help minimize or prevent symptoms. Most Yosemite visitors stick to Yosemite Valley, around 4,000 feet, where altitude is rarely an issue—but if you’re heading to higher elevations like Tioga Pass or Half Dome, a little preparation goes a long way.
Understanding Yosemite’s Altitude
Set along the western slopes of the Sierra Nevada, Yosemite spans a range of elevations from 2,105 feet at the Merced River to 13,120 feet at the summit of Mount Lyell. Iconic landmarks like El Capitan and Half Dome soar thousands of feet above Yosemite Valley, while alpine areas like Tioga Pass bring you well above 9,000 feet. With wildflowers blooming in the foothills and snow lingering in the high country, this variation is part of Yosemite’s magic—but also a good reason to be mindful of how Yosemite’s altitude may affect your adventure.
How to Adjust to Yosemite’s Altitude
Follow our seven simple tips to feel your best during your Yosemite adventure:
Stay Hydrated
At high altitudes, your body loses water faster—even without much activity—so staying hydrated is key. Sip water regularly and consider adding electrolytes to keep your energy up and help your body adjust.
Ease into Exercise
If you’re driving in from San Francisco or LA, ease into your Yosemite adventures. Begin with valley trails like Mirror Lake or Lower Yosemite Falls before climbing higher to Glacier Point, Sentinel Dome, or any activity that takes you above 5,000 feet.
Prioritize Rest
A good night’s sleep and short naps can help your body acclimate, so consider a slower-paced itinerary for the first day or two to allow for rest. Take breaks and soak in the epic scenery.
Limit Alcohol
To help your body adjust more easily, consider skipping alcohol for the first couple of nights.
Boost Potassium
Prevent muscle cramps by eating potassium-rich foods like bananas, avocados, spinach, and yogurt.
Protect Your Skin
Higher altitudes increase sun exposure, so protect yourself with sunscreen, lightweight clothing, a wide-brimmed hat, and sunglasses to prevent the dreaded sunburn.
Consume More Calories
At higher altitudes, your body burns calories faster, so fuel up with nutrient-rich meals containing complex carbs, proteins, and healthy fats to maintain energy for your adventures.
With some self-care, you’ll be ready to enjoy everything Yosemite offers. Whether you’re picnicking in the meadow beneath El Capitan, hiking the Mist Trail to Vernal Falls, or cruising Tioga Road to reach Tenaya Lake, being mindful of Yosemite’s altitude simply means setting yourself up to enjoy the journey even more.
Exploring Yosemite National Park
Once you’ve settled in, Yosemite opens up a world of unforgettable experiences. Hike to the misty base of Bridalveil Fall, marvel at the granite giants of El Capitan and Half Dome, take a scenic drive on Tioga Road for sweeping alpine views, and enjoy a wild swim in Tenaya Lake. Wander through wildflower meadows and Giant Sequoia groves, spot wildlife in Yosemite Valley, or catch the sunset from Glacier Point. With plenty of family-friendly adventures in Yosemite and an easy-to-use shuttle system, exploring the park is as seamless as it is breathtaking.
Have a Grand Outdoor Adventure
Venture deeper into Yosemite’s wonders with these top-rated guided experiences:
Hiking & Sightseeing Tour
Start off wandering through a grove of Giant Sequoias, the largest living trees on earth, before heading out to Glacier Point for a bird’s eye view of Half Dome and Yosemite Falls. End the day with more hiking, sightseeing, and a swim in Yosemite Valley to round out the ultimate one-day adventure in Yosemite.
Rock Climbing
Begin your day scaling granite walls on Sawmill Mountain, where climbers of all levels can challenge themselves while surrounded by stunning views of the South Fork of the Tuolumne River. With expert guidance, you’ll conquer thrilling routes before enjoying a well-deserved summit lunch.
Sierra Sunset & Stargazing with a BBQ
Enjoy the best of the backcountry in Stanislaus National Forest during a relaxing evening that includes an incredible sunset and an optional sunset walk as your guide and chef set up a picnic BBQ. After dinner, relax in reclining chairs for a night sky tour with a local and incredibly knowledgeable guide.
Fly Fishing in Yosemite
Experience Yosemite fly fishing with half- or full-day trips for beginners and seasoned anglers. Cast in alpine streams or Yosemite Valley, learn about aquatic ecology, and enjoy sustainable catch-and-release fishing—no boots or waders needed. Whether you’re after a relaxed intro or chasing wild trout in the high country, our private guides tailor each outing to your skills and goals.
Merced River Rafting
Rafting the Merced River is one of the most thrilling ways to experience the Yosemite area—available only in spring and early summer when water levels are just right.
After booking your stay at Under Canvas, adding vetted adventures to your trip is easy.
Where to Stay Near Yosemite
Under Canvas Yosemite offers the perfect balance of comfort and connection to the outdoors. Set on 85 forested acres just 10 minutes from the Big Oak Flat entrance and steps from a shuttle stop, this upscale glamping location features luxe tents with West Elm furnishings, king-size beds, plush linens, ensuite bathrooms, a lobby tent with café-style dining and cozy lounge areas, and daily programming and activities. You’ll sleep under a canopy of California Black Oaks and Ponderosa Pines—while remaining close to the best of Yosemite National Park.