Oahu Hiking Guide: Short Hikes with the Best Views on the Island

If you’re planning a trip to Hawaii, including at least one hike in your itinerary is the best way to see the island’s dramatic landscapes beyond the beach. Whether you are staying for a weekend or a full 7 days, you can easily fit in a few world-class trails without spending the whole day trekking.

Below, I’ve highlighted the best short hikes on Oahu that offer maximum views with minimal time. Our favorite strategy was to hit the trails in the early morning to beat the tropical heat, leaving the entire afternoon free for the beach! From iconic volcanic craters to hidden pillboxes, here are four must-do short trails for your next Oahu adventure.

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Diamond Head

The hike begins on a paved path but quickly transitions into a rugged, rocky trail with several switchbacks. As you near the summit, the challenge increases with three sets of stairs. After the first set, you’ll walk through a unique 225-foot tunnel before climbing the final two flights to the bunkers.

Pro Tip: There are several designated viewpoints along the way. If the trail feels crowded, pull over at one of these spots to catch your breath and enjoy the view while others pass.

Important Reservation & Fee Info

Since 2022, all out-of-state visitors must have a reservation to enter the park.

• Weather Policy: Reservations are rain or shine. You can modify your time in advance, but same-day changes are generally not allowed
• Cost: $5 per person + $10 per vehicle for parking.
• Booking: Reservations are available in 2-hour slots starting at 6:00 AM.

Makapu’U Lighthouse Trail 

One of the best things about this trail is the viewing platforms. If you are visiting between December and May, keep your eyes on the ocean! There are telescopes and educational signs along the path that point out the best spots for spotting migrating Humpback whales.

Essential Hiking Tips for Makapu’u

• Beat the Heat: There is zero shade on this trail. The Hawaiian sun reflects off the black asphalt, making it feel much hotter than it is. I highly recommend finishing this hike before 10:00 AM.
• Parking Strategy: The parking lot is notoriously small. We arrived at 9:00 AM and grabbed one of the last spots; by the time we left, cars were parked dangerously along the shoulder of the Kalanianaʻole Highway. Aim for an 8:00 AM start to be safe.

Hidden Gem: The Makapu’u Pillboxes

Most people stick to the paved path, but if you want the absolute best view of the coastline, look for the “secret” trail to the pillboxes.

• The Turn-off: Right before you reach the final lighthouse viewing platforms, look for a dirt path venturing off to the left.
• The Hike: This is a short, quarter-mile scramble. Be prepared to climb over some rocks and navigate through some overgrown brush.
• The Reward: There are three pillboxes in total.
  • Pillbox 1: Mostly crumbled—skip this one!
  • Pillboxes 2 & 3: Continue a bit further to reach the intact bunkers. These offer a much higher vantage point than the lighthouse lookout and are perfect for photos.

Note: Unlike the main trail, this section is not paved and can be slippery. Wear shoes with good grip if you plan to head up here!

Ehukai Pillbox 

The trailhead is located near Sunset Beach Elementary School.

• Where to Park: Do not park in the school or the immediate park lot—signs strictly prohibit hiker parking there. Instead, use the public beach parking right across the street.
• The Climb: The trail starts flat but quickly turns into a steep ascent over rocks, fallen trees, and massive tree roots. Look for the ropes installed along the path; they are essential for pulling yourself up the steeper sections!

The “Two Pillbox” Secret

Most hikers stop at the first pillbox, take a photo, and head back. Don’t stop there! * The second pillbox is only a 5-minute walk further along the ridge.

• The clearing at the second pillbox is much larger, less crowded, and offers a superior panoramic view of the coastline.
• Navigation Tip: On your way back down, you’ll hit an intersection of three trails. Stay to the far right to ensure you return to the original trailhead.

⚠️ Critical Warning: Mud & Rain

This is one of the slipperiest trails on Oahu after a rainstorm.

Check the Ground: The first 1/2 mile is the steepest and becomes a “mud slide” when wet. If you see standing water or deep mud at the very start, turn back. * Our Experience: It took us double the time to reach the top because of the conditions. If it has rained in the last 24 hours, I recommend skipping this hike or bringing a walking stick (you can often find “community sticks” left at the trailhead) and prepared to get dirty!

Koko Crater Botanical Garden

This dirt trail takes you through geographically organized collections. While you won’t get sweeping ocean views here, you get a front-row seat to some of the world’s most unique flora:

• The Plumeria Grove: Located near the entrance, these trees can look bare at first glance. However, keep walking! You’ll soon find vibrant yellow, pink, and purple blossoms that smell incredible.
• International Collections: The garden features distinct sections for plants from Africa and Madagascar.
• The “Sausage Tree”: Keep an eye out for the Kigelia africana. Its massive, sausage-shaped fruit is a fascinating sight you won’t see on a typical Hawaii hike!
• Cacti & Succulents: If you love desert landscapes, the succulent section is a photographer’s dream.

Note: Because this trail is inside a crater, it can get very hot and dry. Even though it’s an easy walk, bring water and wear sunscreen, as the “bowl” of the crater traps heat.

Oahu Hiking Essentials: What to Pack

Don’t let a forgotten item ruin your adventure! Hiking in Hawaii’s humidity and volcanic terrain requires a few specific items:

• Footwear with Grip: For Diamond Head or Makapu’u, sneakers are fine. For the Ehukai Pillbox, you’ll want good hiking boots or hiking shoes.
• Reef-Safe Sunscreen: Many trails offer zero shade. Protect your skin (and the ocean) with a mineral-based, reef-safe sunscreen.
• Hydration: I recommend at least 1–2 liters of water per person. It gets significantly hotter inside the craters than it does at the beach!
• The “Mud Kit”: If you’re heading to the North Shore pillboxes, bring a plastic bag for your muddy shoes and a small towel to dry off after using the beach showers.

Need a full list? Check out my complete Hawaii Packing List so you don’t forget the essentials like a rain jacket or a portable power bank!

Plan the Rest of Your Adventure

Hiking is just one part of the magic of Oahu. If you’re trying to figure out how to fit these trails into a larger trip, I’ve done the work for you!

Check out my Hawaii in 7 Days: The Ultimate Oahu Itinerary for First-Time Visitors! It covers everything from the best sunrise spots to where to find the best poke on the island.