Watch a Pacific sunset fade behind volcanic sea arches, then slip into the warm dark to watch bioluminescent plankton light up with every movement. This three-hour boat tour to Los Arcos pairs geology, local knowledge, and a rare natural light show.
More ways to explore the area's outdoor wonders
The horizon drops a slow ribbon of orange behind the Sierra Madre as your small panga eases away from Puerto Vallarta toward Los Arcos. Salt-tight air and the faint engine hum replace city noise; underfoot the deck rocks with the bay’s breathing. As daylight thins the iron-browned arches of Los Arcos sketch dark monuments against the last light — a geological page of volcanic rock sculpted by waves and time.
Difficulty
moderate
Duration
3 hours
Fitness Level
Comfortable for travelers with basic swimming ability and no serious cardiovascular issues; not strenuous but requires calm-water swimming at night.
Wildlife
History
Los Arcos are volcanic intrusions eroded over millennia; the area has been a fishing and recreational zone for local communities and is now protected as a marine sanctuary.
Conservation
The site is managed to limit anchoring and chemical pollution; use reef‑safe products, avoid touching coral, and follow guides’ rules to reduce impact.
Reserve your spot on the Sunset Boat Tour and Bioluminescent Adventure at Los Arcos today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Arrive hydrated and light
Bring water and a small dry bag for essentials — heavier bags get in the way on a small boat and during the swim.
Use reef‑safe sunscreen earlier in the day
Apply eco-friendly sunscreen before boarding; oils and standard sunscreens can harm coral and plankton and are restricted in many reserves.
Bring a warm layer for after the swim
Temperatures drop on the bay as the sun sets; a lightweight fleece or windbreaker is useful once you stop moving.
Listen to the guide during the swim
Guides control timing and distance in the water to protect you and the bioluminescence — follow their instructions closely.
Swimsuit and quick-dry towel
You’ll be in the water after sunset; a quick-dry towel and swimwear make the transition easy.
summer
Waterproof dry bag or phone pouch
Protects electronics and personal items from spray and during the swim.
Light windbreaker or fleece
Post-sunset breezes can feel cool, especially on the open bay.
winter
Reef-safe sunscreen (apply before departure)
Protects your skin earlier in the day and helps preserve the marine reserve’s ecosystem.
spring