Saguaro National Park has a split personality, both due to the sprawling city of Tucson that lies between Saguaro's two lobes, and because of the two diverse habitats you'll find in the two districts.

40,000,000

Estimated number of seeds a 150-200 year-old saguaro will produce during its lifetime.

1,600,000

Estimated number of individual sagauro cactus plants in the park.

1,025,000 and 546,569

2010 estimated populations of Tucson Metropolitan Area in Pima County and Tucson proper, according to Pima Association of Governments.

91,440

Total acreage of Saguaro National Park.

70,905

Total acreage of the park's federally protected wilderness. Saguaro Wilderness Area was designated in 1976.

16,000

Weight, in pounds, of a large, well-hydrated saguaro, which is typically 85 percent water.

8,666 and 4,687

Respective high points (feet elevation) of the Rincon and Tucson mountain districts.

1,162 and 512

Estimated number of plant species in the Rincon and Tucscon mountain districts, respectively. This is clear evidence of the richer biological diversity of the Rincon Mountain District.

165

Miles of marked hiking trails in the park.

61

Difference, in degrees Fahrenheit, between the park's June average daily maximum temperature (99 degrees) and the January average daily minimum temperature (38 degrees).

35

Years it could take a saguaro to reach six feet in height under the best of growing conditions.

30

Miles between the Tucson and Rincon mountain districts.

25

Number of cacti species found in the park.

15

High-end speed (miles per hour) that can be reached by the roadrunners that live in the park.

10.27 and 12.30

Average annual precipitation, in inches, of the Tucson and Rincon mountain districts, respectively.

6

Species of rattlesnakes found in the park -- sidewinder, western diamond-backed rattlesnake, northern black-tailed rattlesnake, Arizona black rattlesnake, Mohave rattlesnake, and tiger rattlesnake. (Traveler trivia: There's another venomous snake in the park, the Sonoran coralsnake.)

5.75

Size, in inches, of the park's elf owl, said to be the world's smallest owl.

2

Halves of Saguaro National Park, which is comprised of the Rincon Mountain District east of Tucson and the Tuscon Mountain District west of the city.

1

Gallons of water you're urged to drink each six-hour period of active hiking.

1

Number of seeds, out of the 40 million a mature saguaro might produce over its lifetime, that germinate and grow to maturity.