The Passo del Sole - from Acquacalda to Lake Ritom is a 17.1 km trail that starts in Blenio, Distretto di Blenio, Switzerland. Based on our data, the trail is graded as Medium. For information on how we grade trails, please click here. Also, check our latest community posts for trail updates.This trail can be completed in approx 6 hrs 32 mins. Caution is advised on trail times as this depends on multiple variables. For more info, click here.Photo Credit :Gabrielle MerkOffenbacher