Early career Although born in Cali, Montaño started his professional career at
Bogotá side
Millonarios as a teenager. He showed great promise in Colombia and at the age of 20, on 26 June 2004, secured a move to newly promoted
Ligue 1 side
FC Istres in a one-year deal. Montaño appeared in 33 Ligue 1 games in his first season in Europe and netted 2 goals, but was unable to prevent Istres from
finishing last and returning to
Ligue 2.
Montpellier Following the club's relegation he was sold to fellow Ligue 2 side
Montpellier. After playing with Montpellier for four seasons in Ligue 2, the club were promoted in
2009 after finishing two points behind champions RC Lens. During the promotion campaign, Montaño finished with 15 goals, three behind top scorer
Grégory Thil, and also contributed with seven assists. In the club's first season back in the
French top flight, Montpellier finished in 5th spot on 69 points, just two points away from a
Champions League spot. The other two promoted clubs,
Le Mans and
US Boulogne, fared much worse and immediately dropped back down to Ligue 2, with Montaño scoring goals against Boulogne. Montaño was a big part of Montpellier's success that campaign as he contributed with 11 goals, from 84 shots, and three assists. Included in this, was an impressive brace against Lille on 22 November 2009, that saw his side win 2–0, and a long range effort that helped his side to a dramatic 2–1 victory over Lyon on 23 December.
Stade Rennais After a successful five-year spell at Montpellier, Montaño joined Rennes in summer 2010. He signed a four-year deal with the club and was brought in following the departure of
Jimmy Briand to
Lyon. The transfer fee paid to Montpellier was reported as €6 million. He made his debut for the club on 14 August 2010, the opening day of the Ligue 1 season against
AS Nancy. He made an immediate impact, scoring the opening goal and providing an assist for
Yacine Brahimi, as his side eventually won 3–0. On 9 January 2011 Montano scored his first brace for the club, coming in a 7–0 thrashing of
Championnat National side
AS Cannes. Following a horrendous 5–1 loss to
Sochaux on 29 January 2011, Rennes pulled off five straight Ligue 1 victories to go temporarily top of the table on 5 March 2011. Montaño was very instrumental in this run, scoring three goals in three straight games. The first goal of this run came on 13 February against relegation threatened
Nice, scoring the winning goal in a 2–0 victory. He followed this up seven days later, converting an 88th-minute penalty to see off
Toulouse and send his club up to second spot. On 26 February, Rennes played host to
RC Lens, with
Abdoulrazak Boukari and Montaño scoring to send Rennes above
Lille in the league table. Following this game, Montano was only able to find the net two more times for the rest of the campaign. He scored one and assisted
Jérôme Leroy for the winner against
AS Saint-Étienne on 15 May 2011, and also found the back of the net against champions Lille on 29 May. Rennes eventually ran out of steam, finishing in sixth spot, but did secure a
UEFA Europa League play-off spot. Montaño finished his first season with the
Brittany club as an important part of the offense. He started in 31
Ligue 1 fixtures, netting nine goals and adding four assists. The start of the league campaign was impressive for Rennes as well, Montano scored one and assisted another on the opening day of the new
Ligue 1 season. This time it came against newly promoted
Dijon and his side won 5–1. On 18 August 2011, Montaño scored the winning goal of their first leg Europa League play-off tie against
Red Star Belgrade in Serbia. His 75th-minute strike put Stade Rennais in control of the tie and favorites to advance to the group stages. In the second leg Montaño opened the scoring in the 10th minute and was later substituted by
Stephane Dalmat, as Rennes won 4–0, 6–1 on aggregate. On 18 September Montano put his side 1–0 up in the 19th minute against
AS Nancy-Lorraine after being fed in by strike partner
Jonathan Pitroipa, the match ended in a 1–1 draw. In the final game of the season on 20 May 2012, Montaño opened the scoring in the ninth minute as Rennes went on to secure a 5–0 defeat of relegated club
Dijon.
Return to Montpellier On 7 August 2013, Montpellier re-signed Montaño from fellow Ligue 1 club
Rennes.
Orsomarso In January 2019, Montaño signed with
Orsomarso in Colombia. ==International career==