The duration depends on the experience you have booked.
Each experience clearly states its duration before you complete your booking.
As a general guide, our stargazing experiences usually last around 2 hours, plus the driving time from the meeting point to the observing location. The journey time varies depending on the observing site selected that evening according to the weather conditions.
The Roque de los Muchachos Observatory Tour lasts approximately 1.5 to 2 hours.
For Private Tours and Masterclasses, the duration may vary depending on the experience you choose.