Sergio Henao aims to deny his friend Nairo Quintana a first-ever Tour de France win
The Colombian climber showed suspect blood and urine values, but the UCI has determined there is "no basis to proceed further."
The Colombian climber has now been pulled twice because of questions over his biological passport readings.
Diego Rosa's long-range attack succeeds in Pais Vasco, as Sky's Sergio Henao takes GC lead with one day remaining.
Between Nairo Quintana, Rigoberto Urán, and three others, Colombia has an embarrassment of riches in its Rio Olympics road race team.
The British team could be a threat in every stage race it starts this season, thanks to some new signees over the winter.
Sergio Henao attacks late in a hilly stage to claim victory and take the overall lead ahead of the race's final time trial.
Sagan surprises everyone by staying close to the climbers on Mt. Baldy and then delivering the GC win on the final stage
Frenchman Julian Alaphilippe (Etixx-Quick-Step) is sitting in good position among the main GC protagonists in California
Peter Sagan wins a short time trial in Santa Clarita to vault into the overall race lead with two stages remaining