Flotation at a glance
- Set by
- Deck area against loaded weight
- Loaded weight
- Body plus clothing, boots and pack
- Typical adult sizes
- 22 to 30 inch decks
- Also depends on
- Snow density, which varies by region and season
How flotation is sized
Snowshoes are sold by deck length in inches, and that number is really a flotation rating. A longer, wider deck spreads your load across more snow, so you sink less. Every maker publishes a recommended load range for each size, and reading that range correctly is the whole of the sizing decision.
The figure the range refers to is your loaded weight, not your body weight. Winter clothing, boots, water, food and layers add up fast, and a full overnight pack can add a third again. Sizing on body weight alone quietly puts you a size short on exactly the deep days that justified buying snowshoes.
Why snow density changes the answer
Snow is not one surface. Dense, wind-packed and spring snow supports a walker far better than cold dry powder, so the same person can be well served by a short shoe in one region and undersized in another. Flotation is a relationship between the shoe, the load and the snow, not a fixed property of the shoe.
That is what modular flotation tails exist for. Some shoes take a clip-on extension at the back that adds deck length only on the trips that need it, which is a cheaper answer than owning two pairs when your conditions swing week to week.
Why more is not simply better
A long deck is heavier to lift thousands of times a day, clumsier in trees and on sidehills, and it forces a wider stance that most people feel in their hips by the afternoon. The working rule is to buy the smallest size that carries your loaded weight in the snow you actually walk in.
What this means when you're choosing
- The maker's published load range for the specific size, not the model as a whole
- Whether the shoe accepts clip-on flotation tails, if your snow varies a lot
- Deck width as well as length, since both contribute surface area
- An honest estimate of your winter pack weight, not your summer one
Flotation vs Microspikes
| Flotation | Microspikes | |
|---|---|---|
| Problem solved | Sinking into snow nobody has packed down | Sliding on snow that is already compressed |
| Typical conditions | Fresh snow, early mornings, off the main track | Popular winter trails, glazed and refrozen surfaces |
| Weight carried | Roughly 3 to 7 lb a pair | Roughly 10 to 14 oz a pair |
| The test | You are dropping to the shin or deeper each step | Your feet skate on a hard track |
Which to pick: They solve different problems and are not alternatives. Most winter hikers who go out regularly end up owning both, and choose at the trailhead based on whether they are sinking or sliding.
The common mistake
Sizing on body weight instead of loaded weight
This is the most common error in the category. Someone weighs themselves in the morning, picks the size that covers it, then loads a winter pack and finds themselves sinking anyway. Add your clothing, boots, water, food and pack before you read the maker's range, and size to that total.
Common questions
What size snowshoe do I need?
Add your body weight to your clothing, boots and full pack, then pick the smallest size whose published load range covers that total. Most adults on rolling terrain land on a 22 to 25 inch shoe, and deep dry powder or a heavy winter pack pushes that toward 30.
Do wider snowshoes float better than longer ones?
Both add surface area, so both add flotation. Length is the dial makers actually offer, and width is usually fixed per model. A wider deck also forces a wider stance, which is the part people find tiring.
What are flotation tails?
Clip-on extensions that lengthen the deck at the back, so one pair of shoes covers two sizes worth of conditions. They are sold separately and are worth it if your snow varies a lot between trips.
Where this is defined
- Snowshoeing, National Park Service
- Winter Hiking Tips, National Park Service