Location
Alta Vista Ventures Ltd. (AVV-TSX-V) is pleased to announce
that its Optionee, Tosca Mining, has entered into a contract with Layne De
Mexico SV de SV to undertake a drill program on Alta Vista’s Carol project
located in southern Sonora State, Mexico, and approximately 4 km from the
Piedras Verdes porphyry deposit, Mexico’s third largest copper
producer.

Work is being conducted by Alta Vista on behalf of Tosca. Site
preparation is now underway with drilling expected to commence by the end of
April. The initial drill program will consist of 5 to 7 HQ size holes totaling
500-700 metres.

The drill program is the first ever to be conducted on
the property. The planned drilling will investigate the continuity, extent and
morphology of near surface skarn mineralization occurring within a shallowly
dipping metasedimentary sequence, as well as possible porphyry-style
mineralization at depth. It will focus on the Balde Sur area where previous work
at Carol by Alta Vista identified widespread polymetallic skarn-style
mineralization has been outlined in two mineralized zones: Balde Norte that
measures 700 metres by 180 metres and Balde Sur that measures 1,100 metres by
400 metres. 5 trenches were dug in Blade Norte and12 trenches were completed in
Blade Sur (see news release dated July 10, 2008).

This most recent work
(see news release dated January 27, 2014) re-opened select portions of two of
these trenches in Blade Sur, BS-06 and BS-08, to validate past results in
preparation for a proposed drill program. Continuous chip channel sampling,
conducted at one metre intervals, confirmed the presence of significant
mineralization in both trenches as follows:

Average Grade
Trench
Width (m)
Cu (%)
Ag (g/t)
Zn (%)
Au (g/t)
 
 
 
 
 
 
BS-06
8.0
1.06
22.5
11.87
0.26
BS-08
11.0
0.38
22.4
0.48
0.08
and
8.0
0.48
16.5
0.62
0.07

Additionally, two
grab samples taken from historic workings located in the immediate vicinity of
trench BS-06 (one to the south and one to the north) returned significant high
grade results as follows:

Average Grade
Sample
Width (m)
Cu (%)
Ag (g/t)
Zn (%)
Au (g/t)
 
 
 
 
 
 
BS-06 N
grab
7.00
94.3
34.00
0.61
BS-06 S
grab
3.70
30.3
19.00
0.67

Samples
from Carol were prepared and analyzed by IPL Inspectorate in their facilities in
Mexico and Vancouver, respectively. Samples generally consisted of 1-3 kg of
material. Gold, silver, copper, lead and zinc were analyzed as part of a
multi-element ICP package using an aqua regia digestion. Over limit samples with
greater than 1% Cu, Pb and Zn were re-analyzed using ore grade detection limits.
Samples with greater than 20% Zn were re-analyzed a second time for using even
higher parameters.

For details on sample handling and quality control
please visit: http://www.altavistaventures.ca/s/Sampling_QA_QC.asp.

Ian
Foreman, P.Geo., president of Alta Vista Ventures and independent to Tosca, is
the Qualified Person, as defined by NI 43-101, for the Carol Project and is
responsible for the technical information in this news
release.

On behalf of the Board,

“Ian
Foreman”

Ian Foreman, P.Geo.
President

For additional information on Alta Vista Ventures please call
the Company at 604-678-2531.

Neither TSX Venture Exchange nor its
Regulation Services Provider (as that term is defined in the policies of the TSX
Venture Exchange) accepts responsibility for the adequacy or accuracy of this
release.

Statements in this press release, other than purely
historical information, including statements relating to the Company’s future
plans and objectives or expected results, may include forward-looking
statements. Forward-looking statements are based on numerous assumptions and are
subject to all of the risks and uncertainties inherent in resource exploration
and development. As a result, actual results may vary materially from those
described in the forward-looking statements.

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Major Drilling Group International Inc. is one of the world’s largest drilling services companies primarily serving the mining industry. Established in 1980, Major Drilling has over 1,000 years of combined experience and expertise within its management team alone.