Gran Colombia Gold Corp. announced high-grade intercepts from the first 59 diamond drill holes totaling 10,229 meters of an in-fill drilling campaign that is being carried out by the Company’s Mine Geology Department at the El Silencio mine at its Segovia Operations. This 23,000 meters drilling campaign, which commenced in 2020 and will be completed this year, is focused on resource definition within the underground mine developments of the El Silencio mine and complements the previously announced 60,000 meters drilling program being carried out in 2021 by the Company’s exploration team. High-grade intercepts from two new veins recently discovered by this in-fill drilling campaign at the El Silencio mine provide and corroborate information of importance for the current and future development of different sectors of this flagship mine. The Company’s Mine Geology Department currently has three diamond drill rigs in operation at Segovia carrying out resource definition within the underground developments of the El Silencio mine in a program that has another 13,000 meters of drilling to be completed this year. In addition, as outlined in the Company’s press release dated June 9, 2021, the Company has another seven diamond drill rigs in operation at Segovia, with three rigs carrying out resource definition on the Sandra K mine from two purpose-built surface platforms and one underground drill station within the underground developments of the Sandra K mine; one rig operating from Level 3 of the Sandra K mine targeting the down-plunge extension of the south ore-shoot of the El Silencio mine; one rig operating from surface at Providencia exploring the westernmost end of the Providencia vein system; one rig operating from the deepest underground developments of the Providencia mine exploring the down-dip extension of the Marmajito Vein; and one rig operating from surface at Carla to follow-up the high-grade intercepts encountered at depth during the last drilling campaign. Exploration and in-fill drilling on the northern sector of the Manto Vein System, from underground stations ES900N-A, ES710N-A, ES810N-A and ES610N-A, installed on levels 22, 25 (ES710N-A/ES810N-A) and 26, respectively, led to the discovery of a new high-grade vein called the 1040 Vein, which is an E-W trending structure, shallow-dipping to the NE, located in the footwall of the 1180 Vein and interpreted to merge into the Manto Vein System down-dip. Multiple high gold grades were intersected from 32 multi-target drill holes (6,900 meters) on the main vein system with maximum intersection grades of 137.44 g/t Au and 10.1 g/t Ag over 0.56 meters on the 1040 Vein (ES-GM-U51-20). The footprint of the orebody outlined on the 1040 Vein so far is over 500 meters down-dip by 200 meters wide, and it remains open up and down-dip. The 1040 Vein will be incorporated into the El Silencio mine plan through the ramp RP1130N from Level 31 to 38. The discovery of this new orebody offers the potential for additional mineral resource growth and extension of the mine life. Exploration and in-fill drilling on the northern sector of the Manto Vein System, from underground stations ES710N-A and ES810N-A, installed on Level 25, led to the discovery of another new high-grade vein called the 1150 Vein, which occurs in the hanging-wall of the Manto Vein System and is interpreted as a splay off the Manto Vein. Multiple high gold grades were intersected from 21 multi-target drill holes (5,228 meters) on the main vein system with maximum intersection grades of 93.19 g/t Au and <0.3 g/t Ag over 0.54 meters on the 1150 Vein (ES-GM-U59-20). In-fill exploration drilling on the northern block of the Manto Vein System, from underground stations ES900N-A, ES810N-A, ES872N-B and ES615N-A, installed on levels 22, 25 (ES810N-A/ES872N-B) and 26, respectively, was targeted to extend and better delineate the known ore-shoots on the Manto Vein, which is the master structure; and the 1180 Vein, which is a footwall splay off the Manto Vein. Drilling was successful in extending the Manto Vein’s ore-shoot from Level 25 to 28, and better delineated the ore-shoot on the 1180 Vein down-plunge. Multiple high gold grades were intersected from 45 multi-target drill holes (8,047 meters) on the main vein system with maximum intersection grades of 44.49 g/t Au and 98.5 g/t Ag over 0.35 meters on the Manto Vein (ES-GM-U17-21) and 73.03 g/t Au and 32.0 g/t Ag over 0.30 meters on the 1180 Vein (ES-GM-U17-21). High-grade mineralization associated with both ore-shoots remains open down-plunge and will be targeted by in-fill drilling in 2021.