The Mulvehill occurrence is located south west of Upper Arrow Lake and north of Mulvehill Creek.

The area is underlain by quartzite, quartz arenite sedimentary rocks and calc-silicate metamorphic rocks of the Proterozoic to Lower Paleozoic Monashee Complex. The strata strikes northwest and dips moderately to the northeast.

Locally, a 500- metre long radioactive zone, with up to 50,000 counts per second on a McPhar TV-1, occurs in impure sericitic quartzite. Foliation strikes 035 degrees and dips 24 degrees southeast. At the north end of the zone is an intra-formational, stretched, sericitic quartz pebble conglomerate. Here, radioactivity of over 100,000 counts per second is associated with hematite and limonite. Thorium and rare earths are the likely source of the radioactivity.

In 1978, Wollex Exploration completed a program of prospecting and rock sampling on the area as the ARCL 1-2 claims. In 1982, Aurun Mines completed a program of rock sampling, geological mapping and a ground radiometric survey on the area as the Karen claim. These programs were centered on the Karen (MINFILE 082LNE037) occurrence to the south east.

In 2005, Whistler Gold completed a program of rock sampling and a ground scintillometer survey on the area as the Cranberry Creek property. In 2013, the area was prospected as the Mul-Ree and Kar-Ree claims. In 2013 and 2014, the area was prospected as the Mul-Ree and Kar-Ree claims.