Scenic mountain views provided a picturesque backdrop for about 160 runners competing in the Fourth Annual Colossal Cave 5K Road Race held Saturday at Colossal Cave Mountain Park, 16721 E. Old Spanish Trail.

The cooler morning temperatures couldn't tame the sweat as participants followed Colossal Cave Parkway uphill from La Posta Quemada Ranch to the cave entrance parking lot and back down again.

"It's a tough course," said race director Steve Taggart as he snapped photos of racers crossing the finish line.

A portion of the proceeds from the race go to the Civilian Conservation Corps Museum at the park, and runners were encouraged to donate new, unused school supplies for the Shyann Kindness Project's Back to School Supply Drive.

This year's race was named for Tucson resident Al Lindstrom, one of the few surviving members of the CCC. At a week shy of 95, Lindstrom had no problem thanking the crowd and starting the race over a megaphone just as he has since it began four years ago.

Lindstrom worked for the CCC fresh out of high school in 1934 in northern Minnesota.

"That's what got me started in my business career," said Lindstrom. That career eventually brought him to Tucson in 1959 for 11 years. He worked his way up to resident manager at the Duval Esperanza Mine before transferring to Brussels, Belgium, then to California.

"It took me 15 years to get back to Tucson, but I've enjoyed it here ever since," said Lindstrom, who visits the park's museum and talks about his experiences with guests every few months.

Contact photographer Greg Bryan at gbryan@azstarnet.com or 307-1709.