Arizona's 47 Wilderness Areas (Covering 1.4 million acres)
Maricopa County Park System (Greater Phoenix Area)
HikeArizona.com (Very comprehensive)
AZ State Parks (There are 31 state parks.)
National Parks within AZ (There are 22 national sites in AZ!)
Virtual Hiking (See sites, before you go.)
AZ Central Hiking Archives (Covers the whole state in detail.)
Scottsdale Park System (Large number & variety of parks and trails.)
Seven Summits (7 highest peaks for hiking within Phoenix proper.)
Camelback Mountain (At 2,704 feet, Best views in town, Strenuous)
South Mountain (2,660 feet, Strenuous)
Piestewa Peak (2,608 feet; Formerly named Squaw Peak, Strenuous)
Shaw Butte (2,149 feet, Moderate to Strenuous)
North Mountain (2,104 feet, Moderate to Strenuous)
Lookout Mountain (2,054 feet, Strenuous)
Shadow Mountain (1,928 feet, Moderate)

There are numerous hiking and outdoor groups on Yahoo, and new ones are added frequently. Here are the groups I belong to:
http://groups.yahoo.com/group/takeahikeaz/
Group Name | Audience | Details | Website |
| Friends Outdoor, Hiking and Camping Club | Beginner to advanced; All ages welcome | Children also are welcome on most hikes; Non-members can hike with the group for $3 per outing. | http://www.friendshiking.com |
| Desert Adventures | Gay/lesbian/bisexual | http://www.desertadventures.org | |
| Arizona Outdoors and Travel Club | Aged 31 and older only | http://www.azoutdoortravelclub.com | |
| Arizona Trailblazers | Beginner to advanced; All adults welcome | Leashed dogs are allowed on many outings | http://www.azhikers.org |
| Arizona Adventurers | Jewish | This group doesn't hold regular meetings. | http://www.arizonaadventurers.org |
| Wandering Soles | Beginner to advanced; All adults welcome | http://www.wanderingsoles.info |
Hiking: Before you go
Hiking: What To Bring (10 items recommended by Arizona Search & Rescue authorities, plus 4 of my own.)
With the popularity of shared-use trails (Horses, Bicycles & Hikers), there are a few simple rules:
Painted Rock Art is known as "pictographs", and pecked Rock Art is known as "petroglyphs".
One of the many things that draws folks to the great outdoors here in the southwest is the remains of ancient Native American cultures like the Hohokam around Phoenix and Tucson, the Salado in the Supes, the Sinagua up around the Verde Valley and Flagstaff, and the Anasazi and Mogollon along the Colorado Plateau country. It is a wonderful experience to encounter these ruins out in the wild, without fences, gates, signs, or trailmarkers. However, for this experience to continue, its important that people visiting the ruins act with respect - otherwise, it would be all to easy for the land managers to declare areas off-limits. Some basic rules should be followed.
The Colorado Plateau
The southern and western ends of the huge geological formation called the Colorado Plateau is referred to as the Grand Staircase. Its layers of sedimentary rock have been lifted, tilted and eroded, and its colorful cliffs stretch from
The scale of the staircase is enormous...The sedimentary rock layers were 10,000 feet thick before erosion began carving.
The bottom layer of rock at
Grand Canyon now estimated at 17 million years old, 3 times older than earlier estimates
It's been an icon of the majesty of nature, a popular subject of photography and a must-see vacation destination, yet the Grand Canyon's exact age has long been a mystery. Scientists now say that at least part, possibly all, of the canyon is 16 million to 17 million years old.
The canyon's towering walls, with their endlessly alternating layers of rusty red and burnt orange-colored rock, serve as a vertical timeline of Earth's history extending over one billion years. But while the age of the sediment layers has been well-established by geologists, settling on an age for the canyon itself was a bit trickier. In recent years, geologists have bandied about two different theories on when exactly this natural wonder began to form, said Carol Hill of the University of New Mexico, co-author of a new study on the canyon's age. One group dated it to a modest 5 million to 6 million years old based on the age of gravel washed down by the early Colorado River, while another group suspected that the western portion of the canyon is much older than that.
In 2007, Hill, along with lead author Victor Polyak and co-author Yemane Asmerom, also of the University of New Mexico, used a recently-improved technique on mineral deposits collected at 9 sites. By analyzing deposits from cave formations in one layer of the canyon's rock, they arrived at the more ancient age of 16-17 million years old, which is relatively young considering Earth's 4.5 billion years. The finding was released in the March 7 issue of the journal Science.
Why are the Red Rocks red?
The edge of the Colorado Plateau south and east of
Here is a great article on this topic, suitable for any reader: http://geology.utah.gov/online/pdf/pi-77.pdf
Ever get lost while hiking? I have.... 
Next time that happens and you're unprepared, direction can be determined by the sun, or simply look at the barrel cacti nearby. (Pictured)
Unless there are extreme conditions (excessive shade or a steep slope), barrel cacti grow leaning south.
Area Audubon chapters:
Mountain Ranges (Found wholly inside the State of Arizona)
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