Cycling Tracker Strava Takes Quick $12.6M

Strava, the competitive social network and personal tracking tool for avid cyclists that announced its previous round of funding only this January, has already raised some more.

The San Francisco-based company said this week it had taken $12.6 million in Series B funding led by Madrone Capital and including Sigma Partners. (The round from January was $3.5 million.)

A representative for Strava said the company “has been growing like crazy, primarily through word-of-mouth.”

She added that Strava plans to expand from cycling to running and triathlons, and to expand internationally and to additional mobile devices. I covered Strava’s iPhone app launch in March. The company also has an Android app, and syncs with Garmin devices.

Elsewhere in fitness apps, this week WorkSmart Labs launched its first iPhone app, Calorific Lite. And if you happen to know someone running the San Francisco Marathon this weekend, you may want to track them using MapMyRUN, which has partnered with the race.