Old site or new site? You can do it on both, but the instructions are different. For both of them, you need to be a map enthusiast member.

On the old site, when the calculation results show up, there is a button at the bottom that says Download GPX. On the new site, the GPX download button is in the "advanceed features" section that appears when you go fullscreen.

There are two options - the route only or include surrounding campsites/portages. The Garmin Explore website has a problem with the campsites and portages because you usually get an error saying there are too many waypoints, which is why the "route only" option was added.

If you just want waypoints for campsites and/or portages, you can download them from the Downloads page. These files are free.

Edited by user Sunday, May 9, 2021 4:38:52 PM(UTC)  | Reason: Not specified

I personally do not use a GPS to navigate. I only use paper maps. I have a GPS with me, but I only use it to map portages and campsites, not to navigate. There is also an Export to Image option that allows you to print a map that is any size. (This is a map enthusiast feature.) This is what I normally use as a reference. However, this is not meant for navigation or to replace buying a map from a reputable company. I buy a map and then print out a Paddle Planner map as an extra reference.

If you like using a GPS, I would try to get both the route and the portages/campsites on it. I would use the file that has all the campsites and portages from the Downloads page and then load the route using the Route Only option on the route GPX download.