Antelope Island State Park is a 28,800-acre park, surrounded by the Great Salt Lake, and open year round. The northern portion of the island is mostly grasslands and shrubsteppe as well as arid hillsides. The southern portion has a small mountain range that has some coniferous and aspen forest. There are also numerous springs on the island that provide riparian habitat. The most notable is at Fielding Garr Ranch, which is one of the most prolific migrant traps in Utah. On the island are now the following locations in eBird:
Antelope Island (island only)
Visitor Center & Loop Road
Lady Finger Point
White Rock Bay
Road to Garr Ranch
Backcountry (incl. Frary Peak Trail)
But the most notable birding location in the park is The Causeway, a 6 mile road connecting the mainland to the north end of the island. Being a state park there is a daily or annual fee to enter, as well as the Davis County Causeway fee specific to this park.
Antelope Island is the most popular birding destination in Utah. Utah birders flock to the causeway and island almost every week of the year in search of birds. The causeway is world renowned for the enormous flocks of shorebirds, specifically WILSON'S PHALAROPE, and EARED GREBES that can be found here during migration. Gulls, waterfowl, divers, and waders can all be found along various stretches of the causeway. More information about the specifics can be read on the causeway page. The island is a great location to see CHUKAR, BURROWING OWL, ROCK WREN, SAGE THRASHER, WESTERN MEADOWLARK, and LARK SPARROW during various times of year. LONG-EARED, SHORT-EARED, GREAT HORNED, and BARN OWL are also permanent residents here. Garr Ranch has an impressive list of songbird migrants. It's remote location on the southeast side of the island is literally an oasis in a salty desert. You can read more about birding specific locations at the park through the links above!
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 6 miles across the causeway to the island.