News Release: April 27th, 2005 Miscellaneous Project Updates ATW Diamond Project, Canada Almaden Minerals Ltd. (Almaden), along with Williams Creek Explorations Ltd. (Williams Creek) have together purchased for cash Santoy Resources Ltd.'s (Santoy) 20% interest in the North West Territories corporation ATW, which owns a 75% interest in the ATW diamond property in the MacKay Lake area, Northwest Territories. This leaves Almaden and Williams Creek each with a net 37½ % interest in the project. The remaining 25% is held by Aberex Ltd. (15% working interest) and Southernera Resources Ltd. (10% working interest). The property covers the likely source area of a significant indicator mineral train that is known to be at least 20 kilometers long. Past microprobe work on these indicator minerals identified G10 garnets and other minerals that are interpreted to have been derived from at least one kimberlite source that is also interpreted to be at least moderately diamond-bearing (see Almaden's March 22, 2002 news release). Till sampling efforts in the past have narrowed the indicator mineral source area to roughly 1 by 1.5 kilometers in size. This work was also confirmed by abrasion studies carried out on the indicator minerals, indicated a very local source. Last year this reduced area was covered by electromagnetic, magnetic and gravity ground geophysical surveys. These surveys identified several subtle targets within the interpreted indicator mineral source area. A bathymetric survey of the lake bottom in this area has been recommended in order to give better control for the gravity results. This survey will be completed in the coming summer in preparation for diamond drilling the targets in the field season (February to April) of 2006. [ATW +]   Mor, Caribou Creek and Cabin Lake Properties, Yukon Almaden acquired these three properties by staking. Kobex Resources Ltd. (Kobex), which optioned these three properties in 2003 (See Almaden news release of September 2, 2003), has returned the Caribou Creek and Cabin Lake properties to Almaden. Kobex has informed Almaden that it never visited the Caribou Creek and Cabin Lake properties, but did carry out a diamond drill program in the summer of 2004 on the Mor property in which Kobex has retained its right to earn an interest through spending and share payment to Almaden. Almaden has received a report from Kobex prepared by C. Downie, P.Geo., the qualified person on the project under the meaning of National Instument 43-101, on work completed last summer on the Mor property. Kobex carried out a two phase program on the property which included induced polarization (IP) ground geophysics in a first phase and identifying targets that were drilled in a second phase two hole, diamond drill program. These previously reported results (see table below and Almaden news release of October 29, 2004) included intersection from a newly identified zone of massive sulphides which returned anomalous base and precious metal values that are considered by Almaden to be extremely significant and representative of a volcanogenic massive sulphide system in an area underlain by similar geology to that in the Finlayson Lake district (160 km to the northeast) where several important VMS deposits have been discovered since 1994 including the Kudz Ze Kayah and Wolverine deposits. Mr. Downie has recommended a further diamond drill program on the Mor property totaling $247,720.00 in expenditures. The same report states: "IP appears to be a valuable tool in defining the location of buried VMS horizons on the Mor claims. Similar surveys should be conducted on the Caribou Creek and Cabin Lake properties in areas identified as prospective by past geological and geophysical surveys." Almaden will be seeking new joint venture partner(s) to explore the Cabin Lake and Caribou Creek properties where past geochemical and geophysical surveys carried out by Almaden identified anomalous responses in similar geology to that of the Mor prospect. [Mor + ] [Caribou Creek +] [Cabin Lake +]   Galeana Project, Mexico Almaden has been informed by Grid Capital Corp (Grid) that Grid is dropping its option to acquire a 60% interest in the Galeana property from Almaden. In 2004 Grid carried out a diamond drill program diamond drill program on the Galeana gold-silver property, located in Chihuahua State, Mexico. The drill program, consisting of 3 diamond drill holes totaling 560 meters, tested the San Miguel Ahumada zone, one of three major vein structures on the property. All three holes intersected zones of brecciation with local zones of silicification and minor quartz veining. One hole did not reach its intended depth. The highest value was intersected in hole GAD04-05, where a 0.73 meter core interval from 129.12 meters to 129.85 meters assayed 5.01 g/t gold. The drill program was carried out under the direction of Mr. Juan Caelles, Ph.D., P.Geo., a qualified person within the meaning of National Instrument 43-101. Samples were sent to ALS Chemex Labs in North Vancouver for analysis. The Galeana property hosts three major classic epithermal banded quartz-adularia vein systems, the San Miguel-Ahumada-Estrella de Oro, the Faldo Norte and the San Geronimo. All have had limited historic production prior to the Mexican revolution when all mining activity ceased. Mapping, sampling and alteration mineralogic and petrographic analyses of the veins in the Galeana area has resulted in the interpretation that the exposed veins represent a high level within the original hydrothermal system. This interpretation coupled with the identification of high gold grades in fragments found in breccia bodies identified as part of the Miguel Ahumada vein system, suggest that the potential to identify high grade gold and silver ore shoots in the veins may increase with depth. Almaden has not yet received a report of the drilling activities from Grid. At this time it is not understood why the drilling failed to intersect banded vein material identified in shallow historic workings, however the holes may not have been long enough to intersect steeply dipping structures. In a news release made April 22, 2004, Grid announced the results of prospecting on the Galeana which included those from high-grade gold-silver mineralization in epithermal quartz-carbonate float found in the area of the Estrella de Oro vein structure. The area is located 2 kilometers to the south along the projected strike extent of the Ahumada Zone and was not drilled by Grid. The highest assay was returned from sample No. 1519 which assayed 96.9 g/t (3.11oz/ton) gold and >100 g/t (3.2oz/ton) silver. A second piece of float from the same area, sample No. 1518, assayed 18.85 g/t (0.61oz/ton) gold and 98.8 g/t (3.18oz/ton) silver. Detailed prospecting and mapping program to determine the source of the high- grade boulders was never carried out. Upon receiving a report Almaden will review the drilling results and the all the data collected to date to determine how to proceed with the Galeana project. [Galeana +]   ON BEHALF OF THE BOARD OF DIRECTORS Duane Poliquin The Toronto Stock Exchange has not reviewed nor accepted responsibility for the adequacy or accuracy of the contents of this news release which has been prepared by management. Statements contained in this news release that are not historical facts are forward looking statements as that term is defined in the private securities litigation reform act of 1995. Such forward -looking statements are subject to risks and uncertainties which could cause actual results to differ materially from estimated results. Such risks and uncertainties are detailed in the Company's filing with the Securities and Exchange Commission.