–Trekking poles will help you with both the uphills and the downhills on this trail.– It’s really handy to have a(3 Liter capacity) to carry as much water as you can and easily drink along the trail without having to stop as much. But be sure to carry a backup Nalgene or “hard” cased water bottle as well in case your water bladder broke or popped for some reason.– A water filter is an absolute MUST bring on your backpacking trip of Mt. Langley. Do not drink the water in the outdoors without filtering it first. My favorite filter is the, but theis also another great more affordable option.– You should always bring a headlamp + extra batteries on everyday hike or backpacking trip. I’m a big fan of– It’s always smart to at least use thefor peace of mind, even if you don’t have a dedicated handheld GPS device.– Thunderstorms are common in the mountains, so you should be prepared with a rain layer, whether that be a rain jacket or an– Another high-altitude essential. Be prepared and bring at least a nice lightweight down jacket with you like theor the(or other similar jackets).– Bring plenty of food and snacks (a mix of salty and sweet gives you options when you’re not sure what you’ll be craving) to fuel your big adventure! You’ll want to be constantly snacking on your hike to maintain energy. Altitude can make you feel “not hungry” so be sure to eat even if you aren’t feeling hunger. Electrolytes are also great to bring along. I like– Bring at LEAST 2 pairs of socks. Dry feet are the key to preventing blisters. You’ll want to swap out your socks every so often during your hike. Don’t wait till you get hot spots. Anytime you stop to rest, just swap those puppies for a fresh pair and let the other ones dry on the back of your pack. I recommend– these are required when backpacking in the Sierra Nevada’s. Look for one that’s roughly 430 or so cubic inches, I find that fits 3-5 days of food perfectly for me, like theAlso don’t forget your permit, and maybe someif you’re hiking this trail in early or later season as discussed above.