• Large County Map   Produced by the United States Census Bureau, this map portrays
  all counties and their statistical equivalents (2.1 megabytes).

• Google Earth Images   Google Earth is an amazing software application that must be
  seen to be appreciated.
  Links are provided to images for the county highpoints of most states;
  for regional collections of states; and for the entire contiguous USA.
  There are external links to other Google Earth images relevant to
  both highpointing and topographic prominence.

• Interactive County Highpoint Map   Provided by Prof. David Kelley,
  clickable dots for each county highpoint are displayed atop a baseline
  topographic map that may be panned and zoomed at will.

• Pinpoint Map   Red dots indicate county highpoints.
  By Dave Covill with assistance from several other highpointers.

• Collective Highpointer Completion Map  

• Virgin Counties Map   (multiple area color scheme on the map itself)

• Multiple Highpoints Map   - by Jon Mann

• Two-Fer Map   - by Ron Tagliapietra and Dave Covill
  Two-Fer Lists

• Access Category Map               access category definitions
  A work in progress by Edward Earl that shows access restrictions by color code.
  E-mail him with highpoint access information after removing the ".county"
  portion of the address (present to foil web crawlers).

• Ownership Category Map
  A work in progress by Ken Oeser that shows county highpoint ownership by color code.
  

• First Ascent Map
  A work in progress by Ken Oeser that identifies first ascent highpointers by color code.
  

Elevation-Based Maps

• Elevation Map   (color-coded in thousand foot intervals as described by a legend)
  - by Aaron Maizlish

• Highest 50-100-150+ Elevation Map                     the corresponding lists
  A work by Dave Covill showing the highest 166 county highpoints in all fifty states
  (everything above 10,000 feet); and the highest 157 eastern highpoints (all above 3,000 feet)
  in color-coded groups of 50 counties.

• High Five Map                     the corresponding list
  The five highest county highpoints in each state. The map is by Jerry Brekhus.
  For low-lying states there may be more than five counties due to matching elevations.

• Low Five Map   (The five lowest county highpoints in each state.)
  - by Michael Schwartz

• Elevation Gain Map                 elevation gain discussion and lists                 elevation gain rules
  A work in progress by Edward Earl using a definition of elevation gain
  determined as an "average" result after polling active county highpointers
  for their individual elevation gain definition preferences.
  E-mail him with elevation gain information after removing the ".county"
  portion of the address (present to foil web crawlers).

Prominence and Isolation-Based Maps

• County Highpoint Prominence Map
  A work in progress with contributions from Bob Bolton, Jerry Brekhus, Edward Earl,
  Andy Martin, and Adam Helman.

• State Highpoint-Prominence-Isolation Map
  By Edward Earl, this map portrays the counties containing each of three state superlatives.
  

Difficulty-Based Maps

• Class Ratings Map                     class ratings definitions
  A work in progress by Edward Earl for the least technical route to each highpoint.
  E-mail him with class ratings information after removing the ".county"
  portion of the address (present to foil web crawlers).

• Overall Difficulty Map               difficulty ranking project
  A work in progress by Edward Earl for ranking the difficulty (and ease) of counties by vote.
  E-mail him with difficulty (and easy) rankings after removing the ".county"
  portion of the address (present to foil web crawlers).

• Difficult Counties (based upon the Apex and 5,000+ foot required effort lists)
  apex peaks map           5,000+ foot required effort map

• Easiest and most Difficult County in each State Map   - by Ron Tagliapietra
  Easiest County in each State List

• Easiest Counties Map   - by John Mitchler       explanation
  Easiest Counties Lists -     (A-M)     (N-Z)

• County Highpoint "Triple Crown" Map                     Triple Crown List (offsite)
  Triple Crown county highpoints are simultaneously APEX,
  5,000+ feet of gain, and ultra (5,000+ foot) prominences.
  There are only ten such triple crown summits in the lower forty-eight states.
  County highpoints with at least one of these descriptors are also shown with colors
  corresponding to the specific descriptor combination, e.g. cyan
  represents the combination of 5,000+ feet of gain and ultra prominence.

More Elevation-Based Maps

• High Five Average Elevation Map                     Average County Elevation Lists
  Carl Mills has determined the average elevations of counties throughout the United States.
  The map portrays the counties with the highest five average elevations in each state.
  The lists include dozens of additional counties.

• Highest Five Standard Deviation in County Elevation Map           Standard Deviation in County Elevation Lists
  Carl Mills has determined the counties with the largest standard deviations in elevation.
  The map portrays the counties with the highest five standard deviations in elevation for each state.
  The lists enumerate the highest standard deviation county for each state;
  and the highest standard deviation counties regardless of state.

• "Helman Counties" Map                   Helman Counties List
  A map by Jerry Brekhus showing the county in each state with the
  greatest elevation difference between its highpoint and lowpoint.

• Lowest Fractional Relief Map
  A map by Carl Mills showing the fifty counties with the
  smallest values of the fraction (highpoint elevation - lowpoint elevation) / lowpoint elevation.

Miscellaneous Maps

• Largest County in Each State Map
  A map by Jerry Brekhus showing the county in each state with the largest area.

• State Highpoints

• Half of Population Map                   County List
  A map by showing the 146 counties which collectively contain half
  the United States population according to 2010 Census data.

• Highpointer Locations Map                   Highpointer Locations List
  A map and list by Scott Traci, from 2005, showing the numbers of highpointers in each county.

• New York City   Scale is 50 km / centimeter. Distance circles are shown every
  100 km to 500 km. Compass bearings are superimposed.

• northeastern USA   Scale is 100 km / centimeter.

• North America   Scale is 400 km / centimeter.

• World centered on Del Mar in San Diego County, California.
  Scale is 2,000 km / centimeter. Distance circles are shown every
  4,000 km to 20,000 km - the distance to the antipodal point off Madagascar
  in the Indian Ocean. Compass bearings are superimposed.

• Prominence - based Maps