Argonaut Gold Inc. (TSX: AR) ("Argonaut" or the "Company") is pleased to provide an update on the continuing exploration program at its 100% owned San Antonio project ("San Antonio") following completion of the acquisition of Pediment Gold Corp ("Pediment") in January, 2011. San Antonio is located in Baja California Sur, Mexico. The San Antonio gold resource identified within a two-kilometer long mineralized trend has seen significant drilling since 2007. Data from the 36,000 meters of drilling completed in 2010 is not included in the current resource estimate and is being incorporated into an updated National Instrument 43-101 compliant resource study scheduled for completion by the end of Q2, 2011.

SAN ANTONIO DRILL PROGRAM, OVER 36,000 METERS COMPLETED IN 2010

The 2010 drill program included 26,746 meters of reverse-circulation drilling (RVC) and 9,324 meters of combined PQ-HQ-size core drilling, contained within the following areas:


----------------------------------------------------------------------------
   Summary of Infill and step-out              Other drill programs
              drilling
-----------------------------------  ---------------------------------------
Los Planes                   13,903  Met Samples (PQ)                  1,818
-----------------------------------  ---------------------------------------
Intermediate Zone             7,974  Oriented geotech (HQ)             1,844
-----------------------------------  ---------------------------------------
                                     Condemnation and monitor
Las Colinas                   4,206   wells                            4,359
-----------------------------------  =======================================
La Colpa                      1,968
===================================  ---------------------------------------
Total infill 2010            28,050  Total Other programs              8,020
----------------------------------------------------------------------------
                         TOTAL 2010 PROGRAM - 36,070
----------------------------------------------------------------------------

LOS PLANES SIGNIFICANT RESULTS:


--  Increase drill density to enhance and convert gold mineralization into a
    measured category.

--  New mineralization identified 200 meters from the Los Planes resource
    area in step-out drill-hole 10CORC-305, intercepted 30.48 meters of 0.91
    g /t Au starting at 232.3 meters.

--  Additional step-out drill holes revealed other newly discovered gold
    zones that will see 2011 l follow-up drilling

--  Drill Hole Highlights: Drill hole 10PLDD-40 intercepting 45 meters of
    8.53 g/t Au.


Table 1 Highlight gold assays for the Los Planes Drill holes marked as
 "infill" are RVC, while those marked as "metallurgy" are PQ-size diamond
 holes

----------------------------------------------------------------------------
               Section   Azimuth/
Drill       (Northing)        Dip    From      To  Length     Au
hole          (meters)  (Degrees)     (m)     (m)     (m)  (g/t)    Comments
----------------------------------------------------------------------------
10PLDD-38    2,639,825    000/-90   92.80  109.20   16.40   4.37  Metallurgy
----------------------------------------------------------------------------
And                                118.00  148.50   30.50   3.73
----------------------------------------------------------------------------
10PLDD-39    2,639,789    000/-90   28.05   54.64   26.59   1.85  Metallurgy
----------------------------------------------------------------------------
And                                 61.66   95.90   34.24   0.80
----------------------------------------------------------------------------
And                                103.30  169.50   66.20   1.85
----------------------------------------------------------------------------
10PLDD-40    2,639,793    090/-78   70.51  115.50   44.99   8.53  Metallurgy
----------------------------------------------------------------------------
And                                155.85  192.50   36.65   1.55
----------------------------------------------------------------------------
10PLDD-52    2,639,503    000/-90   38.90   69.79   30.89   2.63  Metallurgy
----------------------------------------------------------------------------
And                                 92.65  131.05   38.40   1.77
----------------------------------------------------------------------------
10PLDD-53    2,639,502    090/-60   19.00   32.85   13.85   0.57  Metallurgy
----------------------------------------------------------------------------
And                                 60.75   72.90   12.15   1.55
----------------------------------------------------------------------------
And                                 78.50   85.95    7.45   0.49
----------------------------------------------------------------------------
10PLDD-56    2,639,556    000/-90   13.20   76.70   63.50   0.89  Metallurgy
----------------------------------------------------------------------------
10PLDD-80    2,639,753    090/-60   41.00   99.00   58.00   3.72      Infill
----------------------------------------------------------------------------
And                                113.00  169.00   56.00   1.10
----------------------------------------------------------------------------
10PLRC-259   2,639,519    000/-90   23.47   37.19   13.72   0.72      Infill
----------------------------------------------------------------------------
And                                 96.62  177.39   80.77   1.39
----------------------------------------------------------------------------
10PLRC-260   2,639,396    090/-85  136.25  188.06   51.82   2.26      Infill
----------------------------------------------------------------------------
And                                195.68  207.87   12.19   0.51
----------------------------------------------------------------------------
10PLRC-271   2,639,571    000/-90   24.99   53.95   28.96   0.49      Infill
----------------------------------------------------------------------------
And                                 58.52   79.86   21.34   1.25
----------------------------------------------------------------------------
And                                111.86  203.30   91.44   1.68
----------------------------------------------------------------------------
10PLRC-272   2,639,571    090/-65   17.37   31.09   13.72   0.88      Infill
----------------------------------------------------------------------------
And                                 84.43  148.44   64.01   1.66
----------------------------------------------------------------------------

Table 2 Highlight gold assays for 2010 step-out holes. All holes presented
 in this table are RVC

----------------------------------------------------------------------------
                          Section     Azimuth/
Drill                  (Northing)          Dip   From     To Length       Au
hole                     (meters)    (Degrees)    (m)    (m)    (m)    (g/t)
----------------------------------------------------------------------------
10CORC-303              2,639,543      090/-60  72.24  75.29   3.05     1.13
----------------------------------------------------------------------------
And                                            134.72 139.29   4.57     1.10
----------------------------------------------------------------------------
And                                            226.16 229.21   3.05     0.59
----------------------------------------------------------------------------
And                                            282.55 299.31  16.76     0.27
----------------------------------------------------------------------------
And                                            305.40 308.45   3.05     1.18
----------------------------------------------------------------------------
10CORC-305              2,639,800      090/-60 232.27 262.75  30.48     0.91
----------------------------------------------------------------------------
and                                            293.24 299.33   6.10     0.27
10CORC-306              2,640,466      090/-60  79.86  84.43   4.57     0.80
and                                            143.87 153.01   9.14     0.55
10CORC-307              2,640,662      090/-60  98.15 102.72   4.57     1.77
10CORC-311              2,640,203      090/-60 180.44 206.35  25.91     0.20
----------------------------------------------------------------------------

INTERMEDIATE ZONE SIGNIFICANT RESULTS:


--  New discovered continuous gold mineralization identified on a strike
    length of four-hundred meters; 2010 drilling significantly expanded the
    Intermediate Zone both on strike and down dip by adding a total of 7,900
    meters of drilling (see previous Pediment news releases dated October 6,
    2010 and November 18, 2010).

--  Drill Hole Highlights: Drill hole 10PLDD-75 intercepting 34 meters of
    2.51 g/t Au.


Table 3 Highlight gold assays for the Intermediate zone. All holes in this
 table are core holes.

----------------------------------------------------------------------------
                          Section     Azimuth/
Drill                  (Northing)          Dip   From     To Length
hole                     (meters)    (Degrees)    (m)    (m)    (m) Au (g/t)
----------------------------------------------------------------------------
10PLDD-61               2,639,150      000/-90  18.00  36.27  18.27     1.27
----------------------------------------------------------------------------
and                                             62.90  78.20  15.30     0.99
----------------------------------------------------------------------------
and                                             84.20 100.40  16.20     0.48
----------------------------------------------------------------------------
10PLDD-62               2,639,101      090/-70 155.00 189.90  34.90     1.27
----------------------------------------------------------------------------
10PLDD-63               2,639,196      090/-70  20.72  55.60  34.88     0.66
----------------------------------------------------------------------------
and                                             64.00  85.20  21.20     0.45
----------------------------------------------------------------------------
10PLDD-67               2,639,042      090/-75 137.80 167.00  29.20     1.57
----------------------------------------------------------------------------
10PLDD-70               2,638,996      000/-90 159.90 192.00  32.10     0.77
----------------------------------------------------------------------------
10PLDD-75               2,639,150      090/-60  57.00  91.00  34.00     2.51
----------------------------------------------------------------------------
and                                             97.00 120.00  23.00     0.68
----------------------------------------------------------------------------

LAS COLINAS SIGNIFICANT RESULTS


--  In-fill and step out drilling has continued to confirm the continuity of
    the ore zone and extend gold mineralization down-dip

--  Drill Hole Highlights: Drill hole 10LCDD-72 with 48 meters of 0.89 g/t
    Au, starting at surface. One of the deeper noted intercepts in drill
    hole 10PLRC-286 shows 39.62 meters of 1.09 g/t gold. This zone starts at
    118 meters down dip and supports the depth continuity of the Las Colinas
    zone.


Table 4 Highlight gold assays for the Las Calinas zone.

----------------------------------------------------------------------------
                          Section     Azimuth/
Drill                  (Northing)          Dip   From     To Length       Au
hole                     (meters)    (Degrees)    (m)    (m)    (m)    (g/t)
----------------------------------------------------------------------------
10LCDD-72               2,638,553      090/-70   0.00  48.00  48.00     0.89
----------------------------------------------------------------------------
10PLRC-283              2,638,545      090/-78 133.20 169.77  36.58     1.07
----------------------------------------------------------------------------
and                                            175.87 194.16  18.29     0.59
----------------------------------------------------------------------------
10PLRC-285              2,638,597      000/-90  46.33  95.10  48.77     0.98
----------------------------------------------------------------------------
10PLRC-286              2,638,597      090/-77 117.96 157.58  39.62     1.09
----------------------------------------------------------------------------
10PLRC-293              2,638,753      090/-85  82.91 116.43  33.53     1.19
----------------------------------------------------------------------------

ADDITIONAL DRILLING ACCOMPLISHMENTS


--  Obtained development data to include: oriented core for Pit Slope
    Design, PQ core diamond drilling for metallurgical studies, condemnation
    drilling to sterilize areas for operations and drilling for support in
    hydrological studies.

Please see the Argonaut website for a complete list of drill holes under the Pediment ownership.

To view Figure 1 "Outline of Open Pit Design (as AMEC PA study 2010)", please visit the following link:

http://media3.marketwire.com/docs/ar10322.pdf

To view Figure 2 "San Antonio Project - 3D Perspective of gold-mineralized zones", please visit the following link:

http://media3.marketwire.com/docs/ar20322.pdf

To view Figure 3 "SAN ANTONIO GOLD PROJECT - LOS PLANES RESOURCE ZONE - CROSS SECTION 39,800 N (Looking North)" and Figure 4 "SAN ANTONIO GOLD PROJECT - INTERMEDIATE RESOURCE ZONE - CROSS SECTION 39,150 N (Looking North), please visit the following link:

http://media3.marketwire.com/docs/ar30322.pdf

In regards to the San Antonio gold resource expansion as a result of the drilling in 2010, Vice President of Exploration for Argonaut, Mr. Tom Burkhart said "The exploration and development work conducted at San Antonio during 2010 has significantly advanced the project. I am confident we have excellent potential to expand the project's gold resource. We have made good headway toward our objective of connecting the Las Colinas and Los Planes zones via the extension of the Intermediate zone. This represents a significant milestone as 400 meters of new strike length has been discovered and confirmed; this, coupled with the deposit expansion thru step out drilling indicates that significant exploration upside remains at San Antonio."

2011 DRILL PROGRAM FOR SAN ANTONIO

In mid-March, the Company commenced a 10,000 meter drill program that will include approximately 30 RVC holes in the Intermediate Zone and 40 RVC holes in Las Colinas. The objective is to upgrade the resources in both gold bearing areas to a measured category. Tom Burkhart added: "At San Antonio, there are three main ore zones hosted within the same large structural zone that strikes to the north/south and dips steeply to the west. The 2011 drill program will attempt to join the three gold zones by targeting minor post mineral offsets that currently separate these three resources. Ultimately, we believe this is one continuous structural feature."

In addition, further drilling is planned at La Colpa, which lies 100 meters east of Las Colinas. This underexplored area may represent a parallel mineralized zone where recent drilling results included a 16.6 meter intercept grading 0.52 g/t gold starting at surface, in drill hole number PLDD-86."

RESOURCE UPDATE PLANNED BY SECOND QUARTER OF 2011

All drill data has been provided to AMEC E&C Services, Inc. (AMEC) in Reno Nevada who have been contracted to complete an updated National Instrument 43-101 complaint Technical Report, which will include an updated resource study utilizing all the 2010 drill data. This work is in progress and scheduled for completion by the end of the second quarter of 2011.

Qualified Person Comments/Quality Control Procedures

All summarized interval reported in this news release were calculated using a 0.20 g/t cut-off grade. Intervals contain no more than three low-grade to barren samples between mineralized samples containing over 0.20 g/t gold. The Company utilizes a system of Quality Assurance/Quality Control that includes insertion and verification of standards, blanks and duplicates consistent with industry standards. This Press Release was reviewed and approved by Thomas Burkhart, Argonaut Gold's Vice President of Exploration a Qualified Person under National Instrument 43-101. Mr. Burkhart also reviewed the reverse circulation and core drilling programs and on-site sample preparation procedures at San Antonio.

Samples from the San Antonio Project are shipped by commercial courier from the Company's facility in San Antonio directly to the preparation laboratory of ALS Chemex in Hermosillo, Sonora. The prep lab then sends the sample pulps to ALS Chemex's laboratory in North Vancouver, where they are assayed for gold by fire assay with atomic absorption (Au AA-23 assay method code; 0.005 to 10ppm detection limit). Samples over 10 g/t Au are assayed with gravimetric finish (Assay code AU-GRA21). All samples are also assayed by ICP-MS (code ME-ICP41) for a suite of 35 elements.

Statement regarding width of gold intercepts and true width: The structurally-controlled San Antonio deposit has a north-south to north-northeast strike and dips 45 to 55 degrees to the west. Drill holes oriented on an azimuth of 090 and a dip between 45 and 55 degrees are the closest to representing true widths. On the east portion of Los Planes, the mineralization folds over and becomes sub horizontal. Vertical holes at that location are the most representative of true width.

The potential quantities and grades disclosed herein are conceptual in nature, there has been insufficient exploration to define an updated mineral resources and it is uncertain if further exploration will result in these targets being delineated as an updated mineral resource. For further information on the San Antonio project, please refer to the technical report entitled "San Antonio Project, Baja California Sur, Mexico, NI 43-101 Technical Report on Preliminary Assessment", dated August 2, 2010 and revised August 10, 2010 available on SEDAR and Argonaut's website.

About Argonaut

Argonaut is a Canadian gold company engaged in exploration, mine development and production activities. Its primary assets are the production-stage El Castillo Mine in the State of Durango, Mexico, the development stage San Antonio project and the past producing La Colorada project, both located in Mexico. Argonaut is a producing gold company created by former executive management team members of Meridian Gold Inc.

Creating the Next Quality Mid-Tier Gold Producer in the Americas.

Cautionary Note Regarding Forward-looking Statements

This news release contains forward-looking statements that involve risks and uncertainties that could cause results to differ materially from management's current expectations. Actual results may differ materially due to a number of factors. Except as required by law, Argonaut Gold Inc. assumes no obligation to update the forward-looking information contained in this news release.

Contacts: Argonaut Gold Inc. Nichole Cowles Investor Relations Manager (775) 284-4422 x 101 nichole.cowles@argonautgoldinc.com www.argonautgoldinc.com

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