Sienna Reports 1.4 Meters (M) at 9.7 Grams Per Tonne Gold (G/T) and 1864.4 G/T Silver Within A Longer Interval of 11.1 M at 1.9 G/T Gold and 272.8 G/T Silver

CALGARY, ALBERTA--(Marketwire -06/26/12)- Sienna Gold Inc. ("Sienna" or the "Company") (SGP.V)(SGP.V) is pleased to announce the latest results from new drill holes at Callanquitas, on the Igor project, La Libertad, Peru. The two holes totalled 512 meters (m).

Drill Hole Results

The results are from Holes CA-12-41 and CA-12-42. Both holes cut several mineralized structures.

The best results from Hole CA-12-41 were 1.4 m at 9.7 g/t gold and 1864.1 g/t silver. This intercept is part of a longer high grade interval, 5.4 m at 3.4 grams/tonne (g/t) gold and 520.5 g/t silver, within an overall 11.1 m at 1.9 g/t gold and 272.8 g/t silver.

Drill hole CA-12-42 also returned excellent results with two significant high grade zones within a broad mineralized interval: 3.6 m at 2.0 g/t gold and 38.4 g/t silver and 6.5 m at 5.5 g/t gold and 21.1 g/t silver within a 41.5 m interval at 1.3 g/t gold and 8.1 g/t silver. Full results are given in the table below.

Drill hole CA-12-41 is from the East - West section N4281 while Hole CA-12-42 is from the oblique section NW4750. A map showing the locations of these holes is presented below as is Section N4281. Further maps and cross sections are available on the Sienna Gold website.

Map of Collars and Drill Hole Traces and Section N4281: http://media3.marketwire.com/docs/626sgp_map1.jpg

The Callanquitas Structure

Dr. Owen Miller, Exploration Manager of Sienna Gold, comments, "These latest drill holes continue the excellent results from the Callanquitas drill program.

The mineralization on Section N4281 is present over a vertical interval of 270 m and is open at depth.

It is of particular interest as this is the second time we have intercepted very high grade gold and silver mineralization at the southern end of the Callanquitas structure. Hole CA-12-21 located on section N4233, some 50 m to the south, also returned high grade gold and silver values (See press release dated 28 February, 2012).

Due to the success of the Callanquitas drilling the original 10,000 m program for Callanquitas has been extended to between 13,000 and 14,000 m.

The objective is still to define the first inferred resource for Callanquitas before the end of the year."

Assay results for drill holes CA-12-41 to CA-12-42.

  ---------------------------------------------------------------------------- Drill Hole From To Interval(2) Weighted Averages(1) ---------------------------------------------------------------------------- (m) (m) (m) Gold (g/t) Ag (g/t) ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- CA-12-41 7.90 20.80 12.90 0.5 21.6 ---------------------------------------------------------------------------- including 11.50 14.40 2.90 1.8 57.7 ---------------------------------------------------------------------------- CA-12-41 118.00 130.00 12.00 0.2 32.0 ---------------------------------------------------------------------------- CA-12-41 162.90 174.00 11.10 1.9 272.8 ---------------------------------------------------------------------------- including 164.20 169.60 5.40 3.4 520.5 ---------------------------------------------------------------------------- including 168.20 169.60 1.40 9.7 1864.4 ---------------------------------------------------------------------------- CA-12-41 227.70 236.00 8.30 1.2 20.8 ---------------------------------------------------------------------------- including 230.20 232.15 1.95 4.0 59.8 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- CA-12-42 100.00 100.60 0.60 2.6 15 ---------------------------------------------------------------------------- CA-12-42 148.00 189.50 41.50(3) 1.3 8.1 ---------------------------------------------------------------------------- including 157.40 157.90 0.50 2.0 8.6 ---------------------------------------------------------------------------- including 165.40 169.00 3.60 2.0 38.4 ---------------------------------------------------------------------------- including 175.70 182.20 6.50 5.5 21.1 ---------------------------------------------------------------------------- including 178.90 180.80 1.90 12.5 10.9 ----------------------------------------------------------------------------

(1)It should be noted that these are all angled holes and downhole intervals do not necessarily reflect the true width of the mineralized structure.

(2) Weighted averages were calculated for continuously mineralized intervals using a bottom cut on 0.1 - 0.2 g/t gold, no top cut and minimum internal waste.

(3) This interval contains a 1.7 m zone of no recovery.

A full list of drill holes and significant intercepts is available on the website: www.siennagold.com.

Exploration Update

Two rigs continue on site: one large tracked rig and a man portable rig. A total of 11,500 m has been drilled to date. As mentioned above the current campaign will now be at least 13,000-14,000 m for Callanquitas.

A new NI 43-101 resource calculation is planned for late 2012.

Rehabilitation of access roads and initial mapping and sampling has started at Domo and Tesoro. Drilling is scheduled for later in the year.

Sampling Methodology

Cores taken from the diamond drill rig are stored in plastic core boxes and transported to the camp for detailed logging. Afterwards, the core is cut on site with a diamond saw.

One half is then sent to an accredited laboratory in various sample lengths. William R. Henkle (PGeol), the Company's independent Qualified Person, completed a chain of custody review to ensure the integrity of all sample data.

Assaying Methodology

The samples are analysed by SGS Laboratories in Lima by inductively coupled plasma atomic emission spectroscopy for silver and 37 other elements (included Hg and Te) and a 30 gram fire assay technique for gold. Samples above detection limits are re-assayed using a gravimetric fire assay. The specific lab procedures can be found in the Company's 43-101 report on the Igor property.

This press release was reviewed and approved by William R. Henkle P.Geol who is a "Qualified Person" according to National Instrument 43-101.

Financing

On Friday June 22, 2012 the Company closed the first tranche of the private placement announced on June 5, 2012 in the amount of $2,011,299.65 US. The Company paid a 7% commission in cash and broker warrants to qualified investment dealers. These funds will be utilized for continued exploration on Callanquitas, and general working capital. Securities issued on this closing carry trading restrictions until October 23, 2012.

Sienna Gold Inc. is a gold exploration company with property interests in Peru. Its key prospect is the Igor Mine Project, a formerly producing mine that the Corporation plans to explore further.

If you wish any further information, please feel free to contact John Rucci at any of the contact points noted above.

John M. Rucci, President

WARNING: the Company relies upon litigation protection for "forward looking" statements. The information in this release may contain forward-looking information under applicable securities laws. This forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those implied by the forward-looking information. Factors that may cause actual results to vary materially include, but are not limited to, inaccurate assumptions concerning the exploration for and development of mineral deposits, currency fluctuations, unanticipated operational or technical difficulties, changes in laws or regulations, the risks of obtaining necessary licenses and permits, changes in general economic conditions or conditions in the financial markets and the inability to raise additional financing. Readers are cautioned not to place undue reliance on this forward-looking information. The Company does not assume the obligation to revise or update this forward-looking information after the date of this release or to revise such information to reflect the occurrence of future unanticipated events, except as may be required under applicable securities laws.

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.