Initial Results from the Phase 1 Drill Program at Castle Mountain Project Yield Thick Intercepts of Ore-Grade Gold Mineralization

TORONTO, ONTARIO--(Marketwired - June 20, 2013) - Castle Mountain Mining Company Limited (TSX VENTURE:CMM) ("Castle Mountain Mining", "we", "our" or the "Company") is pleased to announce initial results from its Phase 1 drill program at the Company's Castle Mountain Project in San Bernardino County, California. To date 2,063 m of Reverse Circulation ("RC") drilling has been completed and 5,500 m of Core drilling has been completed in the Phase 1 program. Additional results from the drill program will be released once all assays have been received which is anticipated to occur in July. At that time, management also intends to provide an update with respect to the Company's recently submitted application for a five year extension to December 31, 2025 for the current permit for the Castle Mountain open pit heap leach mine.

Drilling has been completed in 30 holes with assay results for 27 holes included in the table attached to this news release. Assay results for three holes are pending and three of the holes reported in this release had no significant intervals. The average intercept of the 24 holes with reportable intervals was 29 m at an average grade of 0.93 g/t Au. The number of intervals per hole ranged from one to nine with interval lengths ranging from 2 m to 288 m. There has been no evidence of a transition or sulphide zone produced from Phase 1 drilling. The table below highlights four of the better holes:

Table 1: Current Phase 1 Drill Highlights⁽¹⁾

Hole ID	From (m)	To (m)	Interval (m)	Au Assay (g/t)
CMM-001	0	30	30	2.32
including	8	14	6	8.24
CMM-030	100	122	22	2.33
including	112	115	3	9.95
	122	324	202	0.54
including	122	234	112	0.72
CMM-035	47	190	143	1.27
including	173	190	17	4.47
CMM-036	0	288	288	0.79
including	100	159	59	1.01

Reported intervals may not correspond precisely to the 'From' and 'To' due to rounding. The reader should refer the attached table in its entirety for a complete review of the reported results.

"We are very encouraged as results to date confirm our belief that there is significant gold mineralization below and surrounding the previously mined pits, and that the exploration target areas to the South and East hold potential to add meaningfully to future mineable zones. This is a robust mineralized system with encouraging gold grades over substantial intervals throughout the target areas. These results are consistent with the historic studies performed by AMEC in 2002 and Mine Development Associates in 2012," commented Gordon McCreary, President and CEO.

The Phase 1 drill program at Castle Mountain was designed to twin and scissor historic drill holes in and around the previously mined pits as well as to test mineralization in certain exploration target areas allowing us to further define plans of a more extensive Phase 2 program. A surprise from the Phase 1 program has been that oxidation extends much deeper than had previously been assumed. Although sporadic sulphides have been detected at depth, the high level of oxidation bodes well with respect to metallurgical recovery for the potential reactivation of the Castle Mountain heap leach mine.

Gold mineralization at Castle Mountain is hosted in a sequence of Miocene (17Ma-14Ma) rhyolite domes, flows and associated sedimentary units. The hydrothermal system is typical of other low-sulfidation gold deposits within the Great Basin. Very fine-grained gold and electrum occurs disseminated in and adjacent to quartz-stockwork veins, brecciated rhyolite domes, structures and silicified volcanic rocks.

Previous exploration at Castle Mountain focused on northeast-trending structures and rhyolite domes as the principle ore-controlling features. The initial targets for CMM's Phase 1 drill program focused on these features. As CMM's drill program progressed the importance of other structural and lithologic settings for gold mineralization became apparent. Later holes were re-directed to test targets identified through interpretation of early results. Intersections of northwest- and northeast-trending structures, and structural intersections within other lithologies other than the rhyolite domes, contain gold mineralization. An example of this change in interpretation is at the north end of the Oro Belle pit. Early holes (CMM-005 through CMM-009) were directed northwesterly to test projected northeast structures. Results from these holes were below expectations. After reviewing the information, CMM-036 was drilled in a northeasterly direction. Gold grades in CMM-036 were significantly higher and over longer intervals than in the earlier holes.

Additional holes were planned for the Phase 1 program in the area of CMM-015 and CMM-016 (assay results pending) but these were not drilled. Based on the results, expected in July, from the two holes that were drilled, a decision will be made whether or not to include these six planned holes in a future drill program.

Upon completion of the Phase 1 program and analysis of the results with the aid of computer generated models, Castle Mountain Mining expects to start a Phase 2 program at the property. Castle Mountain Mining has engaged RPA Inc. to work with the Company in developing a program that will, amongst other things, identify optimal drill locations, meet and exceed QA/QC standards, and allow the historic drilling on the property made up of 354,800 m of drilling across 1,729 drill holes to be used to create a mineral resource on the property that is in accordance with National Instrument 43-101 ("NI 43-101"). The Company anticipates the release of the technical report following the completion of the Phase 2 drill program.

About Castle Mountain Mining Company

Subject to certain obligations, Castle Mountain has 100% of the right, title and beneficial interest in and to the Castle Mountain Venture, a California general partnership, which owns the Castle Mountain property in San Bernardino County, California. The Castle Mountain heap leach gold mine produced over one million ounces of gold from 1992 to 2001, when mining was suspended due to low gold prices.

The Castle Mountain venture land holdings (7,458 acres total) include patented claims (1,298 acres), and unpatented claims (3,209 acres), covering approximately 4,507 acres, plus additional leased claims of approximately 2,951 acres. The Company has recently completed the Phase 1 drill program which tested several exploration targets at various locations on the property. Assay results are pending on three holes from the Phase 1 program and are expected to be available for release in July.

Neither the 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 news release.

Sampling Procedures and Quality Assurance

The scientific and technical information in this news release has been reviewed and approved by Kevin Kunkel, CPG, Castle Mountain Project Manager, who is a Qualified Person as defined by NI 43-101. The exploration activities at Castle Mountain were carried out under the supervision of Mr. Kunkel.

All gold assays are by a 30 g Fire Assay charge followed by an atomic absorption finish (with a 0.0005 g/t lower reporting limit). Samples reporting values > 10 g/t are re-analyzed using a 30 g Fire Assay charge followed by a gravimetric finish. All composites utilize a 0.2 g/t cut off and may include internal waste. Some intervals may not add or subtract correctly due to rounding, but are deemed insignificant. Analyses are carried out by ALS in their Reno, Nevada laboratory. ALS is independent of Castle Mountain Mining Limited and any of its subsidiaries. Blank and standard samples are used for quality assurance and quality control and a review of the results of analyses of the blanks, standards and duplicates by the Company's Qualified Person indicates values are within normal and acceptable ranges. Mr. Kunkel has verified the data underlying the results contained in this news release.

About Castle Mountain Mining and the Castle Mountain Project

Castle Mountain Mining Company Limited, through its wholly owned subsidiaries including Castle Mountain Venture, is focused on the exploration and, if warranted, development of deposits in San Bernardino County, California. The principal gold mineralization identified to date within the Project are below and surrounding the historically mined Pits on the Property including the Oro Belle-Hart Tunnel, Jumbo, and Lesley Anne-Jumbo South Pits, as well as in the South Domes area. Historic non-compliant NI 43-101 mineral resources for the project were outlined in a technical report entitled "NI 43-101 REPORT ON THE CASTLE MOUNTAIN PROPERTY, SAN BERNARDINO COUNTY, CALIFORNIA USA" by Thomas Temkin, CPG, dated October 24, 2012 which is available on SEDAR at www.sedar.com.

Forward-Looking Statements

Statements contained in this news release that are not historical facts are "forward-looking information" or "forward-looking statements" (collectively, "Forward-Looking Information") within the meaning of applicable Canadian securities legislation and the United States Private Securities Litigation Reform Act of 1995. Forward Looking Information includes, but is not limited to, disclosure regarding possible events, conditions or financial performance that is based on assumptions about future economic conditions and courses of action; the timing and costs of future exploration activities on the Company's properties; success of exploration activities; results of assays; permitting time lines and requirements; time lines for technical reports; planned exploration and development of properties and the results thereof; and planned expenditures and budgets and the execution thereof. In certain cases, Forward-Looking Information can be identified by the use of words and phrases such as "plans", "expects" or "does not expect", "is expected", budget", "scheduled", "suggest", "optimize", "estimates", "forecasts", "intends", "anticipates", "potential" or "does not anticipate", believes", "anomalous" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved".
In making the forward-looking statements in this news release, the Company has applied several material assumptions, including, but not limited to, that the current exploration and other objectives concerning the Castle Mountain Project can be achieved and that its other corporate activities will proceed as expected; that the current price and demand for gold will be sustained or will improve; that general business and economic conditions will not change in a materially adverse manner and that all necessary governmental approvals for the planned exploration on the Castle Mountain Project will be obtained in a timely manner and on acceptable terms; the continuity of the price of gold and other metals, economic and political conditions and operations. Forward-Looking Information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by the Forward-Looking Information. Such risks and other factors include, among others, risks related to the availability of financing on commercially reasonable terms and the expected use of proceeds; operations and contractual obligations; changes in exploration programs based upon results of exploration; future prices of metals; availability of third party contractors; availability of equipment; failure of equipment to operate as anticipated; accidents, effects of weather and other natural phenomena and other risks associated with the mineral exploration industry; environmental risks, including environmental matters under U.S. federal and California rules and regulations; impact of environmental remediation requirements and the terms of existing and potential consent decrees on the Company's planned exploration on the Castle Mountain Project; certainty of mineral title; community relations; delays in obtaining governmental approvals or financing; fluctuations in mineral prices; the Company's dependence on one mineral project; the nature of mineral exploration and mining and the uncertain commercial viability of certain mineral deposits; the Company's lack of operating revenues; governmental regulations and the ability to obtain necessary licenses and permits; risks related to mineral properties being subject to prior unregistered agreements, transfers or claims and other defects in title; currency fluctuations; changes in environmental laws and regulations and changes in the application of standards pursuant to existing laws and regulations which may increase costs of doing business and restrict operations; risks related to dependence on key personnel; and estimates used in financial statements proving to be incorrect; as well as those factors discussed in the Company's public disclosure record.
Although the Company has attempted to identify important factors that could affect the Company and may cause actual actions, events or results to differ materially from those described in Forward-Looking Information, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that Forward-Looking Information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on Forward-Looking Information. Except as required by law, the Company does not assume any obligation to release publicly any revisions to Forward-Looking Information contained in this news release to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Castle Mountain Mining Company Limited

Table 2: Phase 1 Drill Intercepts, Castle Mountain Project, California

(To Accompany News Release Dated June 20, 2013)

Hole	Type	Total Depth (m)	Target Area		From (m)	To (m)	Interval (m)	Gold (g/t)	Comments
CMM-001	RC	122	Jumbo/Oro Belle highwall		0	30	30	2.32
				Includes	8	14	6	8.24
CMM-002	RC	274	Jumbo/Oro Belle highwall		249	252	3	0.53
					260	272	12	0.44
CMM-003	RC	182	Jumbo/Oro Belle highwall						No significant intervals
CMM-004	RC	261	Jumbo/Oro Belle highwall						No significant intervals
CMM-005	Core	231	Oro Belle		29	32	3	0.40
					41	47	6	0.51
					64	67	3	0.26
					125	137	12	0.74
				Includes	128	133	5	2.52
					158	161	3	0.21
					166	174	8	0.40
CMM-006	Core	232	Oro Belle		0	232	232	0.22
					54	60	6	1.13
					143	151	9	1.15
					163	175	12	0.47
					200	205	5	0.45
					214	230	16	0.56
CMM-007	Core	226	Oro Belle						No significant intervals
CMM-008	Core	240	Oro Belle		14	27	13	0.30
					154	161	7	0.42
CMM-009	Core	270	Oro Belle		5	9	4	0.51
					140	143	3	1.85
CMM-010	RC	152	Oro Belle		27	30	3	0.33
					55	99	44	0.63
				Includes	76	91	15	1.30
CMM-010	Core	152-334			182	193	11	0.42
					270	275	5	1.45
					290	295	5	0.42
CMM-011	RC	225	Jumbo/Oro Belle highwall		8	11	3	0.29
					17	21	4	0.25
CMM-015	Core	372	621 Target						Assays pending
CMM-016	Core	377	621 Target						Assays pending
CMM-020	Core	254	Jumbo/Oro Belle highwall		53	63	10	0.31
					92	100	8	1.09
					118	146	28	0.39
					150	157	8	0.63
CMM-021	Core	299	Jumbo/Oro Belle highwall		4	7	3	0.44
					80	83	3	0.48
					95	98	3	0.71
					113	117	4	0.38
					145	158	13	0.40
					167	173	6	0.86
					181	185	4	0.25
					215	218	2	1.03
CMM-022	RC	182	Jumbo/Oro Belle highwall		0	36	36	1.22
				Includes	0	12	12	3.05
					53	61	8	0.32
					157	176	19	0.61
CMM-023	Core	147	Oro Belle		12	44	32	0.36
					61	65	4	0.27
					81	85	4	0.41
					97	106	9	0.21
					116	119	3	0.36
					123	129	6	0.39
CMM-024	Core	231	Oro Belle		30	35	5	1.05
					45	49	4	0.36
					72	82	10	0.85
CMM-025	Core	184	Jumbo/Oro Belle highwall		33	36	3	0.70
CMM-026	RC	243	Jumbo/Oro Belle highwall		226	243	17	0.26	Bottomed in mineralization
CMM-027	Core	217	Jumbo/Oro Belle highwall		64	75	11	0.32
CMM-028	RC	178	Jumbo/Oro Belle highwall		23	29	6	1.05
					35	47	12	0.68
					50	55	5	0.79
					93	96	3	0.35
					112	119	7	0.26
CMM-029	Core	337	Lucky John						Assays pending
CMM-030	RC	122	JSLA		100	122	22	2.33	Mineralization in RC section continues into core section
				Includes	100	103	3	6.15
				Includes	112	115	3	9.95
CMM-030	Core	122-324	JSLA		122	324	202	0.54
				Includes	122	234	112	0.72
				Includes	125	134	9	1.26
				Includes	200	203	3	2.11
				Includes	239	275	36	0.35
				Includes	284	295	11	0.29
CMM-031	RC	122	JSLA		71	122	51	0.47
				Includes	97	103	6	1.58
CMM-031	Core	122-313	JSLA		122	313	191	0.38
				Includes	122	150	28	0.85
				Includes	128	130	2	2.10	Includes 55 g/t Ag
					157	167	10	0.88
					189	195	6	0.67
					298	304	6	0.60
CMM-032		301	JSLA		18	285	267	0.37	Top 18 m dump material
				Includes	30	33	3	0.63
				Includes	53	55	3	1.63
				Includes	75	80	5	1.58
				Includes	108	111	3	0.25
				Includes	120	138	18	0.47
				Includes	143	242	99	0.52
				Includes	143	155	12	0.82
				Includes	164	172	8	0.62
				Includes	192	196	4	1.62
				Includes	199	202	3	1.45
CMM-033	Core	301	Lucky John Target		28	301	273	0.37	Top 28 m dump material
				Includes	147	211	64	0.89
				Includes	168	177	9	1.27
				Includes	189	197	8	1.01
				Includes	208	211	3	1.00
CMM-034	Core	145	JSLA		133	145	12	0.30	Bottomed in mineralization
CMM-035	Core	295	Lucky John Target		47	190	143	1.27	Top 25 m dump material
				Includes	89	108	19	2.30
				Includes	103	108	5	4.60
				Includes	132	138	6	3.11
				Includes	173	190	17	4.47
				Includes	183	190	7	7.98
CMM-036	Core	288	Oro Belle		0	288	288	0.79
				Includes	42	47	5	1.25
				Includes	60	65	5	0.46
				Includes	66	87	21	3.27
				Includes	68	80	12	4.68
				Includes	80	85	5	0.40
				Includes	100	159	59	1.01
				Includes	117	122	5	6.36
				Includes	122	137	15	1.19
				Includes	224	228	4	0.23
				Includes	257	271	14	0.34
				Includes	277	288	11	0.59

To view the Drill Hole Location Map (To Accompany News Release Dated June 20, 2013), please visit the following link: http://media3.marketwire.com/docs/cmm0620fig1.pdf.

⁽¹⁾ These holes are among 30 holes with assay results for 27 holes included in the table attached to this news release. The reader should refer the table in its entirety for a complete review of the reported results.