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Colorado 4WD Trails


The purpose of this project is to create electronic maps of the Colorado 4WD Trails for Garmin GPS units (with mapping capability). Although numerous printable maps and GPS waypoints of the trails are available the addition of GPS maps allows more energy to be spent enjoying the trails and surrounding areas versus navigating.

This is an on-going project with additional trails added as time allows. The trails are added in a somewhat random order so if there one you would like to be added sooner rather than later please let me know.


The maps have the following features:

- Trails calibrated to aerial images where possible (see comparison)
- High visibility line style for trails (style only visible on newer mapping units)
- Roads and trails
- Lakes and streams
- Elevation contours
- Points of interest (summits, mines, scenic views, etc.)


Here is a list of the trails currently included:

- Buena Vista Area - approximately 20 trails (Added 17 June 2007)
- Great Sand Dunes NP (Added 20 June 2007)

Trails are added as they are completed - check back for updates.


Below are a few example screenshots of the maps on a GPS:

GPS screenshot #1 GPS screenshot #2 GPS screenshot #3

The first two were taken from a Garmin GPSmap 76CSx, the last from the Garmin Colorado 400t (with hill shading). Here is a view of a map from within Garmin's MapSource:

GMS screenshot #1

Download and Installation

The installation of the maps is fairly simple. The maps can be utilized from within Garmin's MapSource product (if available) or simply uploaded to your GPS unit. Note that the custom style (trails and POI) are only available in the MapSource version.


The accuracy of the data used to create these maps varies greatly. These maps are to be used for reference purposes only. The author(s) are not responsible for any inaccuracies and no responsibility is assumed for damages or other liabilities due to the accuracy, availability, use or misuse of the data presented. Installation and use of these maps is at your own risk!

For use from with Garmin's MapSource, download and execute the installation package. A README file with more detailed usage information will be displayed upon completion of the installation.

For standalone use, download and execute the autosend package.


The Colorado 4WD Trails mapset should overlay any other mapset present on your GPS unit. If conflicts arise (between mapsets), simply hide/show mapsets as described here.


Any feedback (comments, corrections, questions, etc.) is welcome and encouraged. I primarily make these maps for my own use and as a learning experience but it is good to hear when others find them useful. Please direct all feedback to the email address shown at the top of this page.


This mapset is free to download and use. If you find these maps useful please consider making a donation to help offset the costs incurred in producing and offering them (hosting, bandwidth, software, etc.)



Guide to Colorado Backroads & 4-Wheel Drive Trails
An excellent resource covering Colorado trails, includes trail descriptions, detailed directions, maps and photos.

4WD Adventures Colorado
Another excellent resource focusing primarily on easier, less extreme, trails. Includes area history, trail descriptions, detailed directions, maps and photos.

Data Sources

The data sets utilized for creating these maps are obtained from the following sources:

National Agriculture Imagery Program (NAIP)
This data set contains imagery from the National Agriculture Imagery Program (NAIP). NAIP acquires digital ortho imagery during the agricultural growing seasons in the continental U.S. and provides ortho imagery within one year of acquisition. NAIP provides 1 meter ground sample distance (GSD) ortho imagery.

Colorado DOT Geographic Data
Provides transportation and boundary data in ESRI Shapefile format as either statewide or county files. Originally created to support CDOT planning projects and have been compiled from various sources and scales.

USGS National Elevation Dataset
The National Elevation Dataset (NED) is a new raster product assembled by the U.S. Geological Survey. NED is designed to provide National elevation data in a seamless form with a consistent datum, elevation unit, and projection.


Several software applications are used, the main ones being GlobalMapper, which is used for the majority of data manipulation/configuration and cGPSmapper, which is used to compile the data into a Garmin map file.

Last updated: 28 January 2008