;21 January 2013 — San Luis to Villa Mercedes, The first stage contained no major difficulties, with the only categorised climb of the parcours being a Category 3 climb, the Alto Saladillo, situated from the start. From that point, the course was mostly a descending false flat to the finish in Villa Mercedes. A breakaway of seven riders racing for non-World Tour teams formed and enjoyed a lead of eight minutes as they crested the Alto Saladillo. Flavio de Luna from a Mexican selective team was the first atop the climb, which earned him the red jersey for the mountains classification leader at the end of the stage. Upon the descent, the sprinters' teams,, and took station at the front of the peloton, bringing the escapees' advantage down to four minutes with remaining. The remnants of the break were ultimately caught in the closing stages, setting up a bunch sprint finish. Peter Sagan tried to lead-out his teammate Lucas Sebastián Haedo to the line, but a crash occurred in the final stunting most teams' lead-outs. Mark Cavendish avoided the incident, launching from the train and won clearly, ahead of rivals Sacha Modolo and Alessandro Petacchi, to take a début victory for his new team,.
Stage 1 Result
Stage 2
;22 January 2013 — Tilisarao to :es:Terrazas del Portezuelo|Terrazas del Portezuelo, The parcours for the second stage was relatively similar to the previous stage, with only one categorised climb – the third-category Alto Paso Grande coming in the first third of the race – during its itinerary. The finish at Terrazas del Portezuelo provided the riders with a twisty uphill finish, but was still expected to provide a sprint finish. A five-rider move went clear after of racing, including Emmanuel Guevara of local team, who was first atop the only climb of the day, moving him level on points with the mountains classification leader, Flavio de Luna. Guevara later had to depart from the breakaway due to him feeling unwell. Nevertheless, the break enjoyed a maximum lead of almost five minutes, but was reeled in mostly by the and teams. Sacha Modolo of derailed the big teams' plans as he beat rivals Mark Cavendish and Leigh Howard in the sprint. Modolo confided afterward that he learned the finish was uphill during the race while chatting with other riders, as he first thought it would be flat. Along with the victory, Modolo assumed the leader's jersey from Cavendish, on countback.
Stage 2 Result
Stage 3
;23 January 2013 — La Punta to :es:Mirador del Potrero|Mirador del Potrero, Stage 3 was denoted as the queen stage of the race, and included two categorised climbs in the opening half of the stage; a third-category climb was followed by the first-category Alto de Nogoli climb, at the midway point. The stage continued up to a summit finish, on the first-category Mirador del Potrero, above Lake Potrero de los Funes. A breakaway of seven riders went clear early on, and included teammates Jorge Giacinti and Leandro Messineo. Giacinti was the first rider to cross each of the first two climbs of the day in front, collecting enough points to take the mountains classification jersey. Messineo would also join Giacinti during the post-stage ceremonies, as he won the two intermediate sprints of the stage, which was sufficient to take the sprint classification jersey from Walter Pérez. The breakaway was eventually caught by a group of forty riders with to go. At the foot of the long Mirador del Potrero ascent, Alex Correia Diniz of attacked and maintained a slight advantage on the chasers throughout the climb itself, as the gradient increased. The chase was led by a small group which dropped pre-race favourites Alberto Contador, Vincenzo Nibali and Joaquim Rodríguez among others. Diniz held on to cross the finish line solo with an advantage of 24 seconds over his closest rival, Mauro Santambrogio of. With that victory, Diniz took the lead in the overall classification from overnight leader Sacha Modolo, stating that his result was "huge" for Brazilian cycling.
Stage 3 Result
Stage 4
;24 January 2013 — San Luis,, individual time trial The individual time trial stage was mainly flat, with an elevation change of over the first, at which point the riders took a 180-degree hairpin turn and rode the course in the opposite direction, back to the starting point. Canadian Svein Tuft prevailed with a time of, with sprints classification leader Leandro Messineo taking second place, seven seconds behind Tuft. The overall classification leader changed once again as Michał Kwiatkowski recorded the third-fastest time for the course and claimed the race's lead from Alex Correia Diniz of. At the point, Kwiatkowski had recorded the fastest time, some eleven seconds quicker than Tuft, however Tuft's second element of the stage allowed him to move up to the stage victory. After his victory, Tuft said that the wind was a major factor on the course.
;25 January 2013 — :es:Juana Koslay|Juana Koslay to Carolina, The first of Stage 5 were mostly flat, before two categorised climbs within the final. A third-category climb was immediately followed by the first-category Cerro al Amago ascent, a climb of in length with an average gradient of 7.2%. The terrain then became mostly flat until the finish line in Carolina. Emmanuel Guevara of and Vojtěch Hačecký of broke away early and were given some freedom by the peloton since neither rider was a threat for the overall classification. Enjoying the tailwind, the duo had a maximum gap of seventeen minutes. Guevara dropped Hačecký on the slopes of the Cerro al Amago, and still had an advantage of fifteen minutes with to go. The bunch tackled with the climb and put the pressure on, working for their leader Tejay van Garderen, who had been in second place in the general classification overnight, 23 seconds behind the leader Michał Kwiatkowski of. Kwiatkowski himself was struggling on the climb, and was soon distanced, and ensured that the leader's jersey would change hands again. Alberto Contador and Daniel Díaz attacked, but Contador could not sustain the tempo set by Díaz, and fell back to the small group containing van Garderen. Díaz almost made the junction with his fading teammate Guevara, finishing fifteen seconds behind. Guevara barely had the strength for a victory salute, as he crossed the line by swerving dangerously. The stage was a double success for their team, since Díaz had gained enough time to move in the first spot of the general classification.
Stage 5 Result
Stage 6
;26 January 2013 — :es:Quines|Quines to Merlo–Mirador del Sol, Stage 6 was the last mountain stage of the Tour. It contained three categorised climbs, starting with the second-category Alto de Cantana in the first half of the race. The course was then undulating until the uphill finish, commencing with a third-category climb immediately followed by the first-category Mirador del Sol, a long ascent at an average gradient of 8.75%. It was being used in the race for the second consecutive year as a summit finish, as in 2012, Alberto Contador won ahead of Daniel Díaz, but was later stripped of the result. A breakaway of four riders formed, consisting ofMarc de Maar, Mauro Finetto, Adriano Malori and Pieter Weening. Diego Rosa joined them later on, and the group maintained an advantage of three minutes over much of the course, until they were caught at the foot of the Mirador del Sol. Nicki Sørensen of was the first to attack on the climb, but was brought back by the -led field who tried to isolate Díaz for their leader Tejay van Garderen; van Garderen attacked himself, but could not distance Díaz. The group was reduced to about a dozen riders when Contador accelerated in sight of the flamme rouge, creating a sizable gap. Díaz managed to get back to him, before Contador kicked again in the closing stages to win, but Díaz followed him, just two seconds in arrears. rider Alex Correia Diniz caught the duo shortly before the finish line, and also finished two seconds back. Van Garderen, second in the overall classification, lost eighteen seconds to Contador and found himself 33 seconds in arrears of Díaz, with Diniz a close third at 39 seconds.
Stage 6 Result
Stage 7
;27 January 2013 — San Luis to Juana Koslay, The last stage of the race was held over a slightly undulating course which included only one categorised climb; a third-category ascent situated from the start. Going into the stage, the mountains classification was led by Emmanuel Guevara, but he had the same number of points as Alex Correia Diniz, meaning the only categorised climb would determine the winner of that competition. However, neither rider were in a position to score points; thus Guevara won the King of the Mountains competition of the Tour. The breakaway of the day was composed of eight riders, with Michał Kwiatkowski the best-ranked overall in the general classification, 3' 32" behind race leader Daniel Díaz. Later on, three chasers made the junction, and their lead peaked at 3' 40" with to go, making Kwiatkowski the virtual leader for a limited amount of time. The teams of the general classification leaders started to work in a concerted effort at the front of the peloton and with to go, the break was nullified. The finishing mass sprint was won by Mattia Gavazzi, his first victory since returning from a 30-month doping ban; his last victory came at the Settimana Ciclistica Lombarda in 2010. Díaz finished with the main group, and won the overall classification. His team,, enjoyed other successes; adding to Guevara's mountains victory, Leandro Messineo won the sprints classification.
