Having trouble downloading a digital map on iPhone 6

[Gif4445]

I attempted to download section 8 of the TA trail onto my iPhone. Call me stupid, but I can't get it.    I did the purchase and got the sales order confirmation email.  When I select the "TransAmerican bicycle Trail Digital Section 8" in the email body, I get the zip file which has a "open in" prompt.  Selecting that, I get the option of opening it as a text, email, note or iCloud drive. Neither are successful and ultimately lead me to a screen that has "TA08_20160405  Zip archive 118 KB".  Just a dead end screen, that doesn't respond in no way shape or fashion. All of these activites/attempts have been on my iPhone.  Any help would be appreciated.

[jsieber]

It sounds like you don't have an app on your iPhone that is able to display the digital track (.gpx) files. There are many apps on the market that are able to display the digital track files, but we recommend either Good Reader or Easy Trails.

We have a complete set of instructions for using the digital data packages on iPhones and iPads located here:
https://www.adventurecycling.org/routes-and-maps/adventure-cycling-route-network/digital-data-for-devices/tracks/mobile-devices/ios-devices/

Hope this helps!

[Gif4445]

Thanks for the help!