We've visited two different areas in the park and love it. The entrance for nucleo pedra grange is the most popular and is a good workout uphill for an hour and worth it for the view of the city. We have also gone to the nucleo engordador entrance a bit more north which has more nature trails and lots of little waterfalls. Recommend for groups and families. Bring a picnic. Very safe and organized with regular patrols and entrance control. Most don't allow you to start hiking after 3pm so go in the morning.
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