Running USA released the second of three parts of its state of the sport survey.

The group estimates there were at lease 10 million core runners, defined as buying 3 pairs of running shoes a year, running on the road or on trails and entering at least one race a year.

The quick sketch shows that the typical runner is middle aged, well-educated and affluent, which is good news for running specialty stores.

The average female runner is:

• 39.4 years old
• 62 percent are married; 64 percent have no children in the household.
• 50 percent had an individual income of $50,000 or more.
• 45 percent had a household income of $100,000 or more
• 79 percent have college degrees.
• 67 percent have run for 5 years or more

The average male runner:

• Is 45 years old
• 74 percent are married.
• 55 percent have no children in the household.
• 50.6 percent had an individual income of $75,000 or more.
• 57 percent had a household income of $100,000 or more
• 80 percent have a college degree.
• 60 percent have run for 10 years or more.

Check out all of Part II here.