The PILOT EXT prospect is located on the northeast side of Walker Ridge, approximately 7.5 kilometres northwest of Gold Bridge and 75 kilometres west of Lillooet. The workings are approximately 3 kilometres northwest of Gun Lake.

Locally, the property is underlain by intrusives of the Coast Plutonic Complex, Bralorne diorite, ultramafics (serpentinite, listwanite) and Bridge River Group sediments. The dominant structural trend appears to be northwest-southeast.

Three types of mineralization have been identified in the Pilot EXT area: 1) siliceous fractures widening up to 5 centimetres containing pyrite, chalcopyrite or bornite, malachite; 2) carbonate altered shears 1 to 5 metres wide; 3) up to 5 centimetre wide quartz veins containing arsenopyrite.

The area was first explored in 1917 when the Ypres claim group was staked by Messrs. O. Fergusson and C. Walker. Gun Lake Gold Mines Ltd. acquired the property in 1931 and transferred it to Cariboo-Bridge River Gold Properties in 1933. The property was purchased by Pilot Gold Mines Ltd. in 1934, who developed the nearby Pilot Mine workings (MINFILE 092JNE027).

The Pilot Ext showing was first discovered by Cogema Canada Ltd. in 1991. At the time, Cogema Canada Ltd. was conducting an exploration program on the Pilot claim group consisting of mapping; prospecting; rock, soil and stream sampling and VLF-EM and magnetic geophysical surveys. Highlights of this program include rock sample 015R, which assayed 25.1 grams per tonne gold, 5.5 grams per tonne silver and 0.34 per cent copper (Assessment Report 22117).

In 1992, Cogema Canada Ltd. completed detailed mapping, prospecting, chip and grab rock sampling and a small drill program. Highlights include drillhole PLT-3, which intersected a 10.5 metre section grading 1 gram per tonne gold and 0.16 per cent copper, and grab sample BR1066R, which assayed 106 grams per tonne gold and 27.4 grams per tonne silver (Assessment Report 22759).

No work was completed by Cogema Canada Ltd. after 1992, and the claims lapsed.

In 2004, the claims were staked by Daryl Calder for Charles J. Grieg and J. Bernard Kreft, who renamed it the Gunner property. Charles J. Grieg then conducted a small prospecting program.

From 2016 to 2021 the area surrounding the Pilot Ext and Gunner occurrences was held by W. Robb in trust for Nexus Gold Corp., as the New Pilot project. Prospecting, mapping and rock sampling were undertaken in 2016 and 2019. A 13 by 16 metre zone of mineralization approximately 200 metres north of the Pilot Ext workings, consisted of a shear in bleached granodiorite proximal to the contact with Bridge River sedimentary rocks. The 15 samples collected over this zone averaged 2.37 grams per tonne gold, 5.2 grams per tonne silver and 0.55 per cent copper. A malachite-stained quartz vein float sample (R461564) yielded 15.3 grams per tonne gold, 33.4 grams per tonne silver and 2.5 per cent copper. In 2021, a 301 line-kilometre program of airborne magnetic and radiometric was conducted over the New Pilot area to aid in exploration for copper-gold mineralization.