Mr. Joseph Conway reports

PRIMERO PROVIDES SAN DIMAS AND REGIONAL EXPLORATION UPDATE; EXTENDS TOP PRODUCING VEIN AT SAN DIMAS

Primero Mining Corp. has provided an update on its exploration program at its San Dimas mine located in Durango, Mexico. The company also provided an exploration update on its Ventanas exploration property located approximately 32 kilometres south of San Dimas.

San Dimas highlights

• Top producing Roberta vein extended beyond minor fault; intercepts including 24.4 grams per tonne gold and 258 g/t silver over 3.4 metres (RO14-349) and 28.3 g/t gold and 239 g/t silver over 2.4 metres (RO14S-347);
• Discovery of a new high-grade vein in the West block (Marshall vein); intercepts including 22.0 g/t gold and 2,646 g/t silver over 0.9 metre (MSH14-017);
• Alexa vein extended; intercepts including 8.9 g/t gold and 490 g/t silver over 1.9 metre (AL14-126);
• Santa Gertrudis vein extended; intercepts including 14.2 g/t gold and 2,200 g/t silver over 1.9 metre (SG14-012);
• San Jose vein extended; intercepts including 6.6 g/t gold and 470 g/t silver over 4.3 metres (SJ14-029).

Ventanas highlights

• Demonstrated continuous mineralization in the San Pedro ore shoot in the Mala Noche vein, including 11.3 g/t gold equivalent (AuEq) over 3.2 metres and 4.1 g/t AuEq over 10.1 metres (MN14-013), 7.9 g/t AuEq over 6.2 metres (MN14-016) and 7.1 g/t AuEq over 9.7 metres (MN14-019A);
• Discovery of a new ore shoot in the Mala Noche vein, including 7.4 g/t AuEq over 5.4 metres (MN14-008) and 3.6 g/t AuEq over 3.6 metres (MN14-009).

"Our 2014 exploration program in Mexico continues to deliver positive results," stated Joseph F. Conway, president and chief executive officer. "We have extended the known mineralization in one of our largest producing veins at San Dimas, beyond a minor fault that was historically considered its limit. This improves knowledge of the vein extensions eastward in the Central block and is important to the mine life of our platform San Dimas mine. We also discovered a new vein in the West block, which encourages our geologists that this area of the mine will continue to expand as we continue to invest in exploration. Our strategy at San Dimas remains focused on exploring for high-grade mineralization in close proximity to existing infrastructure in order to minimize the time between discovery and inclusion in the mine plan. In addition, we are very pleased with the exploration results from Ventanas, an exploration property close to the San Dimas mine. With further success this property could ultimately deliver additional ore to the expanded San Dimas mill."

The company's 2014 $35-million exploration program includes $15-million in the San Dimas district. The exploration program in Mexico comprises 62,500 metres of drilling at the San Dimas mine and 24,100 metres of regional drilling in Mexico, including 20,000 metres regionally on the San Dimas property and 4,100 metres at Ventanas. The San Dimas mine exploration program is focused on increasing resources close to existing infrastructure. The San Dimas regional exploration program is focused on new discoveries as well as on surface expressions of the known underground veins. The Ventanas exploration program is focused on increasing the existing resource and includes drilling on two past-producing veins and systematic channel sampling.

Top producing vein extended at San Dimas

Exploration and delineation drilling continues in the Central block, which still accounts for the majority of production at the San Dimas mine.

The Roberta vein is the second-largest producing vein in the district, with 18 per cent of the total 2014 production expected to come from this vein. Drilling results have confirmed the granite intrusive does not extend as far west as previously expected and that the favourable horizon steps upward, offset by the Huerta fault system. The Roberta vein known mineralization has been expanded eastward by approximately 400 metres and remains open for an additional one kilometre eastward. Drill results include 24.4 g/t gold and 258 g/t silver over 3.4 metres (RO14-349), 28.3 g/t gold and 239 g/t silver over 2.4 metres (RO14S-347) and 54.5 g/t gold and 1,345 g/t silver over 0.9 metre (RO14-363). As a result of this new structural interpretation, Robertita, the largest producing vein at San Dimas has the same eastward expansion potential.

Exploration drilling in the St. Gertrudis vein commenced at the end of 2013. Drilling in 2014 has focused on the extension of the known mineralization eastward. Drilling results include 14.2 g/t gold and 2,200 g/t silver over 1.9 metre and seven g/t gold and 564 g/t silver over two metres.

The Sinaloa Graben and West block, just west of the Central block, remain a large focus of the company's 2014 exploration program as they contain several of the San Dimas mine's fastest-growing recently discovered veins.

Drilling approximately one kilometre south of the Aranza vein, close to existing infrastructure in the southern part of the West block, the company has discovered a new vein, named the Marshall vein. The Marshall vein is currently a narrow structure (currently 0.5 to 1.5 metres wide) with intercepts including 22.0 g/t gold and 2,646 g/t silver over 0.9 metre. This new structure remains open to the east and west with a potential to increase its thickness.

Approximately 2.5 kilometres north of the Marshall vein in the West block, drilling has proven the extension of the Alexa vein, approximately 225 metres eastward into the hangingwall of the Sinaloa fault. This vein was previously thought not to extend beyond the Sinaloa fault into the Sinaloa Graben, encouraging the company's geologists that it could potentially remain open 1.5 kilometres eastward to the Limoncito fault. The Alexa vein is dipping at approximately 77 degrees and suitable for long-hole mining. Drilling results include 8.9 g/t gold and 490 g/t silver over 1.9 metres (AL14-126).

An additional 1.5 kilometres north, drilling in the San Jose vein has encountered a zone of high-grade mineralization close to the Sinaloa fault. These results encourage the company that the San Jose vein could also extend into the hangingwall of the Sinaloa fault. Primero's exploration team remains optimistic in the exploration and delineation of this area due the clearly structural symmetry which characterizes these veins (Alexa, Victoria, San Jose).

The company remains focused on aggressively exploring in several blocks of the San Dimas district for the remainder of 2014. Primero's geologists remain optimistic the company's exploration strategy will continue to lead to extensions of existing prolific vein systems and the discovery of new currently unknown veins.

Promising high-grade drill results from Ventanas

The Ventanas property is located in the southern part of the San Dimas district, 32 kilometres south of the productive San Dimas mine, along the western flank of the Sierra Madre Occidental mountain range in Durango state, Mexico. The Ventanas concessions cover approximately 3,470 hectares and contain 17 old mine workings.

The Ventanas property is divided into three areas: Mala Noche, Valenciana and San Cayetano. Primero restarted the exploration at Ventanas in October, 2013, with camp habilitation, geological reconnaissance, compilation of old information, surface sampling and a small drilling program that started in November, 2013, in Valenciana vein.

The 2014 drilling program is focused in the Mala Noche area in the homonymous vein. The company has spent year to date approximately $1.2-million on drilling and camp activities. The drilling program has been more productive than anticipated having already completed 7,069 metres of drilling up to Oct. 31, 2014.

The National Instrument 43-101-compliant technical report prepared by ACA Howe International Ltd. in 2009 audited the mineral resources related to individual polygons without assessing continuity between them. Primero's 2014 drilling program was designed to demonstrate the continuity of the ore shoots and test for potential extension at depth and laterally and evaluate the mineralized potential of the vein.

The company has confirmed mineralization in two of the three known ore shoots of the Mala Noche vein, in San Pedro and Macho Bayo. The 2014 drilling program is focused both on confirming the existing mineralized zone and exploring for the lateral and vertical extension of the mineralization in each ore shoot. The mineralized structure shows an important thickness (from 2.5 metres up to 12 metres) with extensive horizontal continuity (both northwest and southeast).

         SIGNIFICANT SAN DIMAS DRILL RESULTS

                             Grade  Grade  Estimated
                From         (g/t) (g/t)  true width
Drill hole       (m) To (m)   gold silver        (m)

AL14-117       317.8  318.8    3.3    245        0.9
AL14-118       330.5  332.3    3.2    237        0.9
AL14-119       314.8  318.1    3.1    192        2.2
AL14-126       357.6  360.7    8.9    490        1.9
SJ14-027       426.0  426.6    9.8    787        0.5
SJ14-029       469.7  474.8    6.6    470        4.3
SJ14-032       500.7  502.6    2.1    138        1.5
SJ14-033       390.4  393.9    4.0    380        2.4
SJ14-036       446.3  448.6    2.3    182        1.5
MSH14-001      192.4  193.7    6.8    507        1.1
MSH14-002      207.0  207.7    2.3    288        0.4
MSH14-005      156.8  157.6    4.9    507        0.8
MSH14-010      155.1  155.9    2.5    265        0.7
MSH14-013      201.4  201.9    5.0    477        0.3
MSH14-015      149.3  150.6    3.1    370        1.1
MSH14-017      157.7  158.8   22.0  2,646        0.9
RO14S-347       90.4   93.9   28.3    239        2.4
RO14-349       113.5  118.0   24.4    258        3.4
RO14-355       125.4  129.3    7.9    260        3.4
RO14-357       145.5  146.2    7.0    320        0.6
RO14-358       142.9  146.1    3.3    607        1.9
RO14-359       133.7  135.5   27.0    510        0.9
RO14-362       234.7  235.2    2.3     87        0.5
RO14-363       199.8  201.2   54.5  1,345        0.9
RO14-363       222.0  223.4   12.9    113        1.0
RO14-365       261.0  261.6    9.9    725        0.4
RO14-366       197.5  199.2    6.0    168        1.2
RO14-366       220.4  221.1   21.8    165        0.6
SG14-012       140.6  143.5   14.2  2,200        1.9
SG14-014        72.7   74.8    7.0    564        2.0
SG14-015        67.4   71.4    5.2    473        3.1
SG14-016        78.2   83.7    3.0    278        3.9
SG14-017        62.0   63.9    5.1    395        1.3
SG14-018        66.0   67.1    3.2    303        1.1


         SIGNIFICANT VENTANAS DRILLING RESULTS

                 From                            True width
Drill hole        (m) To (m)   Gold Silver  AuEq        (m)

MN14-002        213.3  218.2    1.0    137   3.2        4.2
MN14-002        228.5  235.4    0.7    137   2.9        5.3
MN14-003        274.2  280.1    0.8     90   2.2        4.5
MN14-003        283.0  284.3    2.3    149   4.7        1.1
MN14-004        210.1  213.2    2.3     82   3.6        2.2
MN14-004        219.5  220.8    1.4     81   2.7        1.0
MN14-005        216.7  218.9    1.4    103   3.0        1.8
MN14-008        253.6  260.1    2.4    314   7.4        5.4
MN14-008        262.8  263.7    4.4    276   8.8        0.7
MN14-009        209.4  212.1    1.5    199   4.7        2.4
MN14-009        226.4  230.4    1.1    152   3.6        3.6
MN14-011        293.4  297.1    0.9    104   2.6        3.2
MN14-013         28.9   32.7    3.0    519  11.3        3.2
MN14-013         42.5   54.2    1.7    148   4.1       10.1
MN14-014        240.9  251.7    1.3    204   4.5        8.3
MN14-015        249.8  256.7    2.6    229   6.2        5.7
MN14-015        290.2  292.6    2.8    275   7.2        2.1
MN14-016        215.5  222.3    2.3    353   7.9        6.2
MN14-017        261.6  267.0    2.6    177   5.4        4.3
MN14-019A       261.3  273.1    2.6    280   7.1        9.7
MN14-020A       289.6  296.2    2.7    386   8.9        3.8
MN14-021        261.5  263.0    2.8     84   4.1        1.1
MN14-022        247.3  250.1    2.4    114   4.2        2.4
MN14-023        207.9  213.5    1.1    124   3.1        5.4

Drilling at San Dimas and Ventanas was conducted by Primero's exploration team. Gabriel Voicu, PGeo, vice-president, geology and exploration, reviewed the technical exploration information in this news release as the qualified person (QP) for the purposes of NI 43-101 for the company. All samples are half core and analyses reported herein were performed in the ISO-certified independent laboratory SGS Servicios Minerales in Durango, Mexico, using fire assay with atomic absorption finish or gravimetric finish for values over 10 g/t gold. Intercepts cited represent true widths and drilling is generally intersecting interpreted mineralized zones at a high angle. Primero's quality control program includes systematic insertion of blanks, standard reference material and 5 per cent of rejects are reassayed to ensure laboratory accuracy. Generally, in a block of 20 samples one will be a standard and one will be a blank.

We seek Safe Harbor.