Download of TOPO 4.2.8 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The common filenames for the program's installer are BackRoad.exe, TopO_TKO.exe, TopO_SMR_74.exe, TopO_Frc.exe or TopoCalc.exe etc.
The following versions: 4.2, 3.4 and 3.3 are the most frequently downloaded ones by the program users. The software lies within Education Tools, more precisely Science Tools. This program is an intellectual property of National Geographic Maps.
This PC software was developed to work on Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10 or Windows 11 and can function on 32-bit systems. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
TOPO! Features fives layers of the best maps available—from National Geographic Atlas maps to the most detailed USGS topographic maps. Loaded with features and functionality, TOPO! Is essential gear for outdoor enthusiasts.
You may want to check out more software, such as TOPO! Explorer, TOPO! or MapToaster Topo/NZ, which might be similar to TOPO.