In the area there is a wide variety of trails for mountain biking and more, there are for all tastes, more or less "radical", it's a pity that some have limited access because they are located on "private property" :-(
Here's a little bit about the history of the cross (very brief), courtesy of "Parques de Sintra"
"It is the highest point in the Serra de Sintra, at an altitude of 528 meters, from where it is possible to see the most beautiful views over Lisbon and Cascais, to the south, the Atlantic Ocean, to the west, and the saloia region, to the north.
In this place, by order of D. João III, a cross was placed (ca. 1522) which was later destroyed by a storm. In place of the original cross, King Fernando II had a new cross installed in the same location, which was, in turn, destroyed by lightning in 1997.
In 2008 a new replica of the cross was built in a single block of limestone. This new cross, 3.5 meters high, 1.5 meters wide and weighing approximately 1,700 kilos, imitates intertwined trunks and is hollowed out at several points, which made the execution of the replica and its transport to the location, particularly difficult."
A "sonnet" by Francisco José Lopes Costa is engraved on the site. I refer only to one of the blocks:
"...
Go well to your simple majesty
This place given to you O Cruz
Because on this top the light is more intense
And the storm is more intense and beautiful.
..."