2720 - 6080 ft.
You can shorten this by turning around at the Romero Pools: 5.2 miles roundtrip, 2720-3700ft.
Trailhead: From Ina/Oracle, go 6.2 miles north and turn right into Catalina State Park. Go straight for another 2 miles to the parking lot. You need to pay a $7 fee to enter the park unless you have an Annual State Park pass.