A lot has been said and written about blisters and backpacking — too much, really. Blisters are caused by friction, moisture, and heat. Under normal conditions, the conversation about blisters should be short:
Simple, right? If hikers in mild climates did these things, they might hike for six months without a single blister. The PCT presents some complications, however:
1) The fine dust and intense heat of the desert during the first 700 miles makes keeping feet clean and cool top priorities. However these goals are at odds with each other, since the mesh panels that allow air flow and cooling also let in a lot of dust. This is unavoidable and feet must be cleaned each night before going to bed.
2) After entering the Sierras, your priorities shift to keeping feet dry and warm. Snow on the trail and streams flooded with snowmelt conspire to make feet wet and cold.
3) North of the Sierras the trail dries out for a while and the climate is mild, but once in Oregon and Washington the near constant rain makes keeping feet dry very difficult.
1. Sneakers Instead of Boots
Leather boots, even lightweight ones, are not appropriate for most of the PCT. Leather traps a lot of heat — a recipe for blisters and pain during the first 700 miles of desert hiking. Instead, you want a shoe so well ventilated that your feet remain cool. We discuss our shoe recommendations here.
The benefit of boots is ankle support, which you don't really need until the Sierras, and even then not all hikers will find boots necessary. However, hiking over slippery scree fields, rocks, and boulders can still cause rolled ankles, which is why we recommend using trekking poles.
2. Choose Properly Fitting Shoes and Break Them in Before Your Trek
Shoes should not be too snug or too loose — so bring the two pairs of socks you will wear when hiking to the store when trying on shoes. Ensure that there is ½ inch of space between your longest toe and the end of your shoe. Be sure that you have enough room to wiggle your toes inside the toe box, and your heel does not slip when you walk. Choose shoes that breathe well and dry quickly. In other words, shoes with lots of mesh and little leather as possible.
3. Wear Two Pairs of Socks
The oldest trick in the book. Wear a pair of 100% nylon men's dress socks under a pair of thin merino wool socks. Paired together, this sock combination makes friction take place between the two socks and not between your foot and the sock, preventing blisters. Also, never bring untested socks on a long hike. Try out your sock combination at home first to make sure it's comfortable.
4. Wear Gaiters
Gaiters prevent pebbles, leaves, twigs, et cetera from getting into your shoes and causing friction against your feet.
5. Keep Feet Dry in the Sierras, Oregon, & Washington
Once in the Sierras, melting snow and stream crossings can make your footwear very wet, which can cause blisters. In Oregon and Washington, persistent drizzle can keep feet soaked. Switching to mid or lightweight leather boots with a waterproof liner or DWR finish is one option for keeping your feet dry, but after hiking 700 miles in lightweight trail runners, the weight of a traditional boot is too much for many hikers. Another option is to wear waterproof socks like SealSkinz paired with nylon liner socks.
6. Wrap and Tape
People tend to get blisters in the same places. Some hikers always get blisters between their toes, others on their heels. If you know where you are prone to blisters, cover the area with Leukotape athletic tape, duct tape, or moleskin. We recommend you practice taping toes, heels, and the balls of the feet before leaving — it is important the tape be applied smoothly, without wrinkles, and not too tight. Wrapping one’s entire foot is unnecessary. Just tape the usual spots.
We prefer Leukotape over duct tape or moleskin. It molds to the contours of your foot better than duct tape and is cheaper than moleskin. Leukotape has an extremely strong adhesive that lasts for days and yet will not pull off skin when you remove it.
7. Treat Hot Spots Immediately
Before a blister appears, you will feel a hot spot. As soon as you feel a hot spot, stop and apply Leukotape to the area to prevent a blister from forming. You can use self-adhesive elastic bandage if the hot spot is between your toes.
8. Clean and Dry Your Feet at Night
In the desert, sand as fine as talcum powder passes through mesh shoe panels and socks. After you get to camp it is important to take off your socks and clean this dirt to prevent blisters. Use some of your drinking water for this. Only after your feet are completely dry put on a dedicated clean pair of bedtime socks.
You followed all the preventative measures and yet still got a blister. Here's what to do:
Small blister with little fluid - treat like a hot spot
Larger blister with fluid
Large, broken blister
An often recommended treatment for blisters from runners, hikers, and military vets is compound tincture of benzoin. Available at any pharmacy, it doesn’t require a prescription but might be kept behind the counter. Tincture of benzoin comes in two forms, compound which is a treatment for damaged skin, and non-compound which is an inhalant.
Benzoin is the sticky sap of Styrax trees and its stickiness helps tape or bandages adhere longer to skin, though this is not necessary if you use Leukotape. Some guides say that tincture of benzoin accelerates blister hardening and even recommend injecting it into a blister. However this causes intense burning pain when it touches raw skin. It has a reputation for toughening skin where it is applied and many long distance walkers/runners/hikers apply it to sensitive areas every day for a few weeks to toughen those areas.
The trouble: Tincture of benzoin was invented in the 19th century and its many supposed benefits have never been evaluated by the FDA. Like vitamin supplements, it is legal to sell only because manufacturers follow certain regulations. We consider it a folk remedy with no merit — a hiker's urban legend — and do not recommend it.