We'll be going from Hermit Point near the lower left, down to and across the Tonto Plateau on the main west-east trail, and then back up on the Bright Angel Trail. Here's a screenshot of the territory we want to cross: That make it all the more frustrating when you come across gaps in the database, as I did when planning a trip in the Grand Canyon for next week. The maps are nicely designed and provide a lot of details, including trails and waypoints that can be used to automatically plan on-trail routes. There's a lot of prime hiking to be done in all the national forests, parks, and other public lands in this huge area, so this is a potentially useful and maybe indispensable resource for anyone planning and executing on- or off-trail trips in the region. Here is the blurry image from Garmin's web site: Stray beyond those boundaries and you are in no-man's-land. It covers the "four corners" southwestern states: Utah, Colorado, Arizona, and New Mexico.
24K Southwest map set, on a fingernail-sized micro SD card.
But this year, with the prospect of living a full year in the Southwest, I decided to spring for the full monty, Garmin's Topo U.S. It showed many of the trails we wanted to use, but did not include trails as a separate layer for routing so I had to draw in our planned route, some of which was off trail anyway, by hand. When I was planning our trip in the Wind Rivers in '16, I choked on the price of a full Garmin map set and settled for a free topo map set that I found online. More on that in a minute, but this is a review of one of the map sets for Garmin devices.
It took Garmin years to get around to fulfilling promises to supply versions of it software for Macs, and the Basecamp software used for viewing and planning is klunky and non-intuitive, for me at least, especially when it comes to planning routes on existing roads and trails. I am on my third Garmin GPS, an eTrex 30c, which is at least hanging in there for a lot longer than the last one did. I've been a somewhat grumpy Garmin customer for many years now.