This hot spot location is a little confusing as it appears quite a few people use it for checklists anywhere south of the loop road and White Rock Bay. Although technically the Road to Garr Ranch and the actual ranch are on the south part of the island, the hot spot was created technically to list birds south of Garr Ranch. But others, also use it in the mountains, and on the trails in the back country of the island. It may be worth splitting this location into "South of Garr Ranch" as well as "Backcountry" to be more specific and clean things up. The habitat in these 2 areas is very different. South of the ranch the habitat mirrors that of the road to Garr Ranch where primarily grasslands and mixed shrubsteppe make up the majority of the habitat. Some riparian habitat around springs is present, while the dry lake bed is visible from the island. The backcountry differs in that near the mountain range base it includes the above mentioned habitats, but is primarily more canyon based, with some mixed oak woodlands in the canyons Several springs in the back country actually create quite impressive riparian habitats in said canyons. The backcountry generally follows a spine down the west side of the island but is more centrally based and doesn't really reach the real south end.
For the past few years Steve and Cindy Sommerfeld have conducted a monthly bird survey and a good portion of it has focused on south of Garr Ranch creating a great list of at least 100 species occurring there. Unfortunately for most birders the area is hard to access, or closed all together. For right now I will be leaving this open to add details later.
In Layton, take I-15 exit 332 west bound onto Antelope Drive for about 7 miles to the entrance station to the park. After paying an entrance fee continue about 6 miles across the causeway to the island. At the sign where the road splits stay left and continue up the hill till you see the turn off on your left to Garr Ranch. Turn left and follow this road 10.6 miles. The road ends here at parking areas for Garr Ranch on your left, and for some of the back country trails to the south on your right.