Information from Rectory-UL page: The University of Lisbon (UL) and the Technical University of Lisbon (UTL) have a wide offer available for this summer with courses concerning all ages.
Summer Courses at UL The UL summer courses cover a wide range of areas, with more than 30 activities.
From Fine Arts to Social Sciences, Letters, Law, in many colleges / institutes where you can find the course you want for the summer experience.
In addition, ULness Sports Academy also organizes a week of walking in Gerês, among other activities.