Tuesday, May 04, 2010

Rochester Reports Third Quarter 2010 Operating Results
Tuesday, April 27, 2010

Rochester Begins Mine Development at Florida NW and Provides Exploration Update

Tuesday, April 27, 2010

Rochester Begins Mine Development at Florida NW and Provides Exploration Update



VANCOUVER, BRITISH COLUMBIA APRIL 27, 2010 - Rochester Resources Ltd. (TSX VENTURE: RCT) is pleased to announce that development of a crosscut at Florida NW is now underway. The crosscut of 300m is at the 1240 elevation and will cut the continuity of the rich zones of the Florida I, II and III, northwest from the intrusive.

Florida NW has grades similar to those encountered in the Florida SE system. Considering the average historical grades from the Florida SE area, the results obtained from the ramp at level 1300, and the information obtained at the crosscut in level 1240, expectations are that the potential average grade could be 9 g/t gold and 250 g/t silver. The crosscut will provide underground access to 13 veins identified at surface. This is part of the overall mine infrastructure plan of developing over 2.5km in three areas; Crosscut - Florida NW, Footwall drift at level 1240, and the San Eduardo Tunnel.

Concurrently, the Company has implemented a drift development program of over 6,300m to continue building towards significant NI 43-101 compliant resources at Mina Real including:

Area Metres

Florida NW 2,530
Tajos Cuates 2,580
Macedo 1,250

At Macedo, construction and rehabilitation of over 2km of access roads for diamond drill hole sites have been completed.

A total of 355m of drift development has taken place at Macedo where an internal reserve has been blocked consisting of approximately 18.500 tonnes of mineralized material.

Macedo was identified from surface work with the vein surface expression trending for more than 1 kilometre. The vein system is comprised of widths up to 20 metres and is mineralized with both gold and silver.

Drill Program

Rochester initiated its Phase 1 Drill program in late January. To date, a total of 910.15 meters in 5 drill holes have been completed at Florida NW with two drill rigs. A third underground drill rig is to be added shortly at the Tajos Cuates Mine. The first phase drill program consists of 22,000m. Drill results are expected shortly.

The company has also been successful in continuing to identify additional new veins southwest of Macedo in an area named El Tesoro. These new veins include: (See Figure 1)

El Tesoro
Structure identified over 600 meters with widths of 1.30 meters in underground samples averaging 4.27 g/t Au to 1,029 g/t Ag and widths on surface of 0.82m averaging 0.85 g/t Au with 214 g/t Ag.

El Jato
It features variable thickness up to 30m in the SE part consisting of a stockwork zone where the country rock is a rhyolite dome with values of the order of the order of 0.3 g/t Au to 0.8 g/t Au and 20 g/t Ag to 119 g/t Ag. In the NW part of the vein where the structure has widths of 0.30 to 0.70 m and values averaging 3.2 g/t Au and 463 g/t Ag.

El Títere
Structure identified over 100 meters in length. Up to 16.7 g/t Au with 669 g/t Ag with average widths of 0.30 m and 4.0 g/t Au with 226 g/t Ag over a width of 0.20 m

La Finca III
Structure identified over 120 meters. Assays of surface samples reported values of 1.0 g/t Au to 61 g/t Ag over a width of 0.45 m.

Mr. Alfredo Parra, a QP as defined under NI 43-101 has reviewed and approved the technical disclosure herein.


ON BEHALF OF THE BOARD

"Eduardo Luna"

Eduardo Luna, President and CEO Investor information contact:

First Canadian Capital
Tel: 416.742.5600
Toll Free: 866.580.8891

Email: info@rochesterresources.com
Website: www.rochesterresources.com
About Rochester Resources Ltd.

Rochester represents a pure-play in the exploration and development of high-grade gold and silver properties located in Nayarit, Mexico. The Company is a niche player in Mexico which has assembled an attractive portfolio of properties in the Sierra Madre Occidental Range. This is the largest epithermal precious metal region in the world, hosting the majority of Mexico's large tonnage gold and silver deposits. Current production helps generate cash flow and helps fund our ongoing exploration and development. Rochester is well positioned to advance its Projects and can very quickly become a significant player in Mexico. Rochester has a strong senior management team based in Mexico, a workforce in place to advance its projects through to mine development, and strong financial backing to implement and advance our work programs.

Forward Looking Statements

This Company Press Release contains certain "forward-looking" statements and information relating to the Company that are based on the beliefs of the Company's management as well as assumptions made by and information currently available to the Company's management. Such statements reflect the current risks, uncertainties and assumptions related to certain factors including, without limitations, competitive factors, general economic conditions, customer relations, relationships with vendors and strategic partners, the interest rate environment, governmental regulation and supervision, seasonality, technological change, changes in industry practices, and one-time events. In addition, the Company has not conducted an independent feasibility study on the Mina Real project which may increase the risk that the planned operations are not economically viable. Should any one or more of these risks or uncertainties materialize, or should any underlying assumptions prove incorrect, actual results may vary materially from those described herein.

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.