Harborline started with one steady hand and a beat-up boat launch in South Portland. Today our USCG-certified guides lead first-timers, families, and lifelong paddlers out among the islands — because the best way to know this coast is from the water, not a brochure.
Every guide is USCG-certified and Casco Bay born-and-raised
Casco Bay has 136 islands and a tide that changes everything by the hour. We built Harborline so anyone — no experience, no gear, no problem — could see it safely, from a guide who's paddled these waters for years.
Every trip is led by a USCG-certified guide who checks conditions, tides, and gear before a single paddle touches water.
We built our routes and pacing around first-timers — kids, grandparents, and everyone in between paddle with confidence.
Casco Bay's islands are our backyard — our guides know the coves, the seals, and the quiet water only locals find.
From dawn launches to sunset returns — this is the coast our guides paddle every day.
Our founder guided friends and visiting family around the islands on weekends — and kept hearing the same thing: "I didn't know Portland looked like this."
Harborline became a real outfitter — USCG-certified guides, a fleet of stable beginner kayaks, and a promise that no experience would ever be required.
Now we run guided day trips, sunset paddles, and multi-day coastal skills courses — every one led by a local who genuinely loves this bay.
Every Harborline guide is USCG-certified, CPR/First Aid trained, and paddles this bay for fun on their days off.
Lead Guide, 9 years on the bay
USCG-certified and a certified swift-water rescue instructor. Marisol trains every new Harborline guide before they lead a trip.
USCG-certifiedGuide, sunset & family trips
Grew up sailing Casco Bay and knows every seal haul-out and quiet cove worth the detour. A favorite with first-time kids.
USCG-certifiedGuide, multi-day coastal skills
Leads our multi-day skills courses, teaching navigation, tide reading, and rescue technique to paddlers ready to go further.
USCG-certifiedNo gear, no experience, no problem — just a calm bay and a guide who knows it by heart.