North of the Salton Sea is the Coachella Valley, with Palm Springs towards the northern tip. The mountains to the west are the San Jacinto Range. To the east are the Little San Bernardino Mtns, with Joshua Tree National Park. The San Andreas Fault follow the general trend of the Coachella Valley and splits the San Bernardino Mtns. It can be clearly seen to the east of the mtns.
Most positions are aproximate and are indicated with a tilde before the pair.
You can't see 300' on this map. The surface level is 228' below sea level. The area around the sea is the largest land area below sea level in the western hemisphere. The lowest area in the western hemisphere is Death Valley, though. The sea formed in 1905 due to a flood of the Colorado River.