of course, it is not imperative for hikers to go with guides, but it is the safest way to navigate the terrain, as the guides are experts of the region - this is particularly important if there is climbing involved on the journey. 

in addition to the extra safety hiking guides can provide, professional guides are fluent in portuguese and would be indispensable in case of an emergency to communicate with rescue crews.

we highly recommend all hikers to enjoy rio's mountain trails accompanied by an experienced and certified professional hiking guide, found through proper and reliable channels or recommendations. 

another important thing to do, before undertaking a hike or a trek, is to plan for the journey, both physically and through research.