The Trek Across Maine has become a virtual event open for cyclists for the second consecutive year.

The annual event, which had been scheduled for June 18-20, is the largest fundraiser in the country for the American Lung Association. More than $550,000 was raised at last year’s event.

Participants in the virtual Trek can track their own progress and complete their mileage goals for Trek Across Maine by cycling 60, 120 or 180 miles at their own pace before June 30.