Instructables
Picture of How to Fold a Topo Map
Topographic Maps aren't cheap. Well, in most cases they aren't free. Protecting your map is protecting an investment that will give years of use. This instructable will demonstrate (and remind myself) how to fold a map to fit in quart sized ziplocks. I prefer the quart size, so I can put the map in a small accessible pocket on my backpack. The trade off is that that puts more creases in the map. Creases serve 2 purposes. They wear out the map in that spot quicker, but more importantly, if your creases are accurate to the edge, they provide north/south and east/west lines.

This instructable is for 1:24k scale 7.5 minute quadrangles in the U.S. For other countries and maps, you may need to experiment a little.
 
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Step 1: Align the First Fold

Picture of Align the First Fold
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The first fold is the most important. If the first fold is not aligned, you'll get misaligned north south creases. Lay the map face up and fold along the vertical axis. You should then have half a map and the white side should be visible. Line up the edges well and crease.

Step 2: Fold the Sides Back

Take the top layer on the map and fold vertically again toward the crease. Flip the map over and do it again on the other side. What this will do is put the titles that are on the top right and bottom right on the outside of the finished product, making it easy to find the map you want. Make sure the titles are facing you.

Step 3: First Horizontal Fold

Picture of First Horizontal Fold
With the titles facing you, fold the map horizontally so they are no longer visible. Make sure you get a good east-west fold. Match the folds together at the bottom of the map.
Cephus2 years ago
Been hiking up Little Cottonwood, I see! Nice Instructable. I was just at the DWR Store today on N. Temple picking up some topo maps of the Mirror Lake area, and came searching here of ways to fold them.
3leftturns (author)  Cephus2 years ago
And I thought the 2002 Olympics watch was a dead give-away! Have fun and be safe in the Uintas.

I find this fold small enough to fit in a pocket on cargo pants.
Folded my first map today. Nice!

I didn't even notice the watch at first! :-) Though I'm collecting the maps, the Uintas will now likely have to wait till next June or so. I'm brushing up on my orienteering skills for lakes I'd like to visit and potentially backpack to. Nice to still do it the old fashioned way without a GPS, or at least have the knowledge if the electronics fail. I'll have to concentrate my near term hiking (and soon snowshoeing) efforts to closer destinations around SLC and Provo areas.
3leftturns (author) 2 years ago
And I thought the 2002 Olympics watch was a dead give-away! Have fun and be safe in the Uintas.

I find this fold small enough to fit in a pocket on cargo pants.