What I Learned Hiking Mt. Whitney: Real Talk from the Trail

June 13, 2025

Last week, I summited Mt. Whitney, the tallest mountain in the lower 48 at a whopping 14,505 feet, and I’m still sore, sunburnt, and smiling. This hike tested me in ways I didn’t expect, and while it was one of the most rewarding experiences of my life, I definitely learned some lessons the hard way.

Whether you’re in the early stages of planning or already have a permit in hand, here are some things I wish I had known before hiking Mt. Whitney:

1. Build in More Time Than You Think You Need

We all like to believe we know our pace, but altitude, terrain, and conditions can make even the most prepared hiker slower than expected. I planned ahead but not quite enough. From snow crossings to rest breaks and summit celebrations, the day stretched longer than anticipated.

And those last two miles to the summit? They feel like ten. Mentally prepare yourself. It’s a grind.

2. Hydrate, Filter, Repeat

Water is essential and tricky. I packed a 2L bladder plus a water bottle and a water filter with a bladder. I tried to drink the most out of my water bottle versus my bladder as that was easier to fill up. When I was getting closer to the last of the running water, I filled up my filter bladder and water bottle but I ended up using snow to refill my bottle further up the mountain. It was a hot day so it didn’t take long to melt. A water bottle with a built-in filter straw is a game changer. It saved me when natural sources weren’t flowing.

Also, drink plenty of water in the days leading up to your hike. I started hydrating heavily in advance, and it definitely helped reduce the symptoms of elevation sickness.

3. Arrive Early and Acclimate

This one is big: get to the area early. I arrived at Whitney Portal several hours before our hike began to help our bodies adjust to the elevation and I highly recommend it.

I also used Diamox (a prescription medication that helps prevent altitude sickness), took ibuprofen, and stayed super hydrated. Everyone reacts to altitude differently, but these steps made a big difference for me.

4. Train… with a Backpack

I’m active and hike regularly, but the real kicker for me wasn’t the distance or elevation, it was carrying the weight of my backpack for that long. I wish I had trained with my full pack on in advance. Practice with your actual gear, not just the mileage. There are options to drop your gear on the trail but you have to find your way back. I dropped my pack a mile or so before the summit and I wish I would have done it sooner.

Trust me, your shoulders and back will thank you.

5. Protect Your Skin (And Your Lips!)

The high-altitude sun is brutal. I applied sunscreen but still came away with the worst lip sunburn of my life. Not fun.

Bring strong SPF lip balm and reapply it constantly. You can get sunburnt from the reflection of the sun on the snow. Same goes for sunscreen on your face, ears, and neck, any exposed skin needs protection. The UV rays at 14,000+ feet are no joke.

6. Don’t Forget Tech Essentials

If you're using your phone for GPS or trail apps, bring a portable charger. Your battery drains much faster at high altitudes and in the cold. Also, extra batteries for your headlamp are a must, especially if you're hiking in the dark or running behind schedule. I brought a hat that had a light in it along with a headlamp and I am so glad I did. The batteries fell out of the headlamp. I also packed a flashlight which saved me since the hat light was so dim.

7. Leave No Trace

Mt. Whitney is pristine! Let's keep it that way. Pack out everything you pack in, including your wag bag. It’s not just required; it’s the right thing to do. Sadly, we saw some left behind on the trail. Please don’t be that person. Protect the experience for others, and more importantly, respect the mountain.

8. Post-Hike Soreness is Real

I'm not kidding when I say I felt like I’d run a marathon the next day. Even days later, my muscles were still recovering. I can barely walk and stairs… yeah, not doing those. My hip is still numb from glissading down the chutes. It’s a full-body workout: steep ascents, rocky descents, snow crossings, and long hours on your feet. Build in time to recover. Use a massage gun, take baths in Epsom salts, and ice what you need.

9. Comfortable Gear is Everything

One of the best decisions I made was investing in a solid pair of La Sportiva hiking boots from REI. I even had them pound them out at the store to help break them in. Game changer. I paired them with toe socks (yes, the kind with individual toes!), which helped prevent blisters and kept my feet dry the entire hike. I also packed an extra pair of socks and pants in my hiking pack, which came in super handy. When you're out on the trail for 12–18 hours, every bit of comfort counts. Prioritize moisture-wicking layers, supportive footwear, and a well-fitted backpack.

Final Thoughts

Mt. Whitney is one of the most breathtaking, brutal, and rewarding hikes you can experience. It challenged me in ways I never anticipated and taught me more than I could have imagined. Prepare well, respect the mountain, and embrace every moment even when you're melting snow just to refill your water or yelling into the wind because you're exhausted and ready to be off the trail. It's all part of the story, and it’s worth every step.