Eduardo VII Park & Green Corridor

At 65 acres, Eduardo VII Park is close to central Lisbon, and is the beginning of a ‘green corridor’ that stretches to Monsanto Park. The centerpiece of the park is the 0.6 km (0.4 mile) central walk leading from Marquess of Pombal Statue (off Av. de la Liberdade) to the top, featuring the largest flag in Portugal (20×12 meters!) and great views. Run along a wide alley path or along the lower lawn, with box hedges. The park features a lake, a cold greenhouse, and a restaurant.
A loop involving the central walk and the adjoining trails of Park Jardim Amália Rodrigues is a good 3-4 km.  For a longer run, take a jaunt around Gulbenkian Park, just north, or head south from Marquess of Pombal along  the median of the grand Av. da Liberdade to Rossie Square  (1.6 km).

Another good bet is to take the ‘green corridor’, which is a recently completed ‘linear park’ that goes for about 2 miles southwest all the way to Monsanto Park. he trail starts at the northern end of the park, off Rua Marquês de Fronteira (look for the red pavement).