Photo: Hike-a-bike with the single speed, 8:00 a.m., 45 degrees, Vail, Colorado

Weekly activity log:
Swim: 0 yds (ytd 96,750 yds.)
Bike: 144 miles (ytd 3,391 mi.)
Run: 23 miles (ytd 903 mi.)
Hike: A lot

Copper Mountain to Vail Pass to Wilder Gulch to Ptarmigan Pass to... WOW

Photo: 14-mile run, 9:00 a.m., 60 degrees, Vail, Colorado

Weekly activity log:
Swim: 3,800 yds (ytd 96,750 yds.)
Bike: 86 miles (ytd 3,247 mi.)
Run: 23 miles (ytd 880 mi.)

Up, up and away... and a gasp... and a wheeze.

Photo: 11-mile run/15-mile ride/2-mile run brick, 7:00 a.m., 70 degrees, Marion, Iowa

Weekly activity log:
Swim: 6,600 yds (ytd 92,950 yds.)
Bike: 160 miles (ytd 3,161 mi.)
Run: 31 miles (ytd 857 mi.)

It's only closed if you stop.

Photo: 100k single-speed ride, 4k run, 9:00 a.m., 65 degrees, Linn County, Iowa

Weekly activity log:
Swim: 3,500 yds (ytd 86,350 yds.)
Bike: 206 miles (ytd 3,001 mi.)
Run: 31 miles (ytd 826 mi.)