Frankly, nothing beats paper maps for:
But sometimes only a digital image, or digital data, will do. Here is a list of websites to help get you started. See also Maps by Type.
The best type of map to use if you need a small map of a single country on a standard-sized sheet of paper is a base, or outline, map, so called because they contain basic visible surface features and boundaries, and the most prominent feature is the outline of the country's political boundaries.
The Map Collection has two kinds of maps that are excellent for hiking, both of which can be checked out:
A standard Green Trails Map covers the same area as 4 USGS 7.5 minute quadrangles and provides clear, compact, and current information about trails and other recreational features in a convenient size and scale. These maps are 12" x 18" and include 15 minutes of coverage at 1:69,500.