Aconcagua is known mainly as one of the Seven Summits, a trekking peak for climbers. But we are recommending hiking in the region rather than climbing the peak.
This gets you up close and personal to the mountain without the danger of climbing to 6962m (22,841ft). And Aconcagua is dangerous due to altitude and volatile weather.
There are dozens of climbing companies which provide guides and pack animals. However, hikers with high altitude experience could do Aconcagua independently, carrying their own packs.
larger version of this photo – William Marler on SummitPost