Hosmer Grove Loop Trail

Why go

If you’re into birds or curious about Hawaiʻi’s complicated forest story, this half-mile loop is a gem. It’s short, mellow, and oddly beautiful—tall, introduced conifers and eucalyptus from early 1900s forestry experiments give way to pockets of native shrubland. Interpretive signs connect the dots so you’re not just walking through trees; you’re walking through history.

Trail experience

The loop is 0.5–0.6 miles total with roughly 150–175 feet of gain. Expect a natural dirt path with roots and occasional mud after rain. You’ll start in dense, cool shade beneath non-native pines, spruce, cedar, and eucalyptus, then transition to native shrubland that feels like a different island entirely. It’s an easy walk suitable for most visitors; plan 15–30 minutes, longer if you’re birdwatching.

Wildlife & what to look for

This is one of the park’s better quick stops for native honeycreepers. The bright red iʻiwi is a real possibility here, especially in the morning. The contrast between the introduced grove and native vegetation is stark—and exactly the point—so take time with the signs to appreciate what’s thriving and what isn’t.

Is it worth it?

Yes, as a short, educational, and peaceful detour—especially if you’re already touring the summit district. Don’t come for big views; this one’s about ecology, history, and birds. Serious hikers may find it underwhelming on its own, but it pairs nicely with longer nearby trails or a campsite stay at Hosmer Grove Campground.

Best time to hike

Year-round. Mornings are typically clearer, less windy, and better for bird activity. At around 7,000 feet, it can be chilly any time of day, and fog or light rain can roll in quickly—bring a warm layer.

Tips

• Parking is limited—arrive early. If the lot is full, look to the nearby Supply Trailhead.
• Bring binoculars for birding.
• Stay on the marked path to protect fragile native plants.
• Combine with a picnic or the campground if you want a longer pause in the summit district.