Hosmer Grove Bird Loop

This compact loop (about 0.5–0.6 miles total, ~150–175 feet of gain) sits right by Hosmer Grove Campground and is all about the birds. You’ll walk from a shady, non-native forest into open native shrubland—the contrast is the point. Expect a quick stroll with frequent stops to scan for endemic honeycreepers you won’t see anywhere else.

Start in dense plantings of conifers, eucalyptus, pines, spruces, and cedars, a living remnant of Ralph Hosmer’s early 20th-century forestry experiment. Interpretive signs help make sense of what you’re seeing. The loop then opens into native shrubland, where birding really picks up. Two dedicated lookouts—with fixed binoculars that can be finicky—overlook a gulch favored by ʻIʻiwi, ʻApapane, and ʻAmakihi.

Logistics are easy: the loop begins and ends at the campground area with parking, pit toilets, picnic tables, and running water. If the small lot is full, use the nearby Supply Trail parking along the same spur road. Most people spend 15–30 minutes here, longer if the birds are busy. It pairs well with a wander down the Supply Trail if you want to stretch the outing.

Best time to hike: Mornings and sunny breaks are prime for bird activity and visibility. This area sits around 7,000 feet in the park’s cloud belt—chilly, misty, and rainy is normal—so bring layers and a light rain shell. The path is mostly easy but can be muddy with some roots. Bring your own binoculars; the fixed ones help, but personal glass is far better.

Bottom line: If you’re into Hawaiian birds or ecology, this short loop is a must-stop. If you’re not, it’s still a pleasant, low-effort nature walk near the park entrance—just temper expectations: it’s quick, and the wow factor hinges on bird activity and weather.