Leaving Porto on the Ecovia do Litoral, you quickly understand why this stretch of the Atlantic coast draws cyclists back. The first kilometres peel away from the city along the Matosinhos seafront, and within an hour you are threading between salt-bleached dunes and ocean pine forest, the smell of sea wrack heavy in the morning air.
Fishing boats dragged onto the sand at Póvoa de Varzim and Vila do Conde are not decoration — they are still working, and the trawlermen pay you little attention as you roll past.
The route runs roughly 130 kilometres north to Porto's Caminha finish, and most riders split it across two comfortable days, overnighting around Viana do Castelo, which earns its pause. Elevation gain is minimal — this is genuinely flat riding, rarely exceeding 50 metres above sea level — though a handful of short climbs appear near river-mouth crossings.
The surface is mostly tarmac or compacted cycle path, though a few transitional sections between municipalities drop to rough cobble or packed gravel that can rattle narrower tyres. Ride north to south and you typically take the prevailing wind on your back; going south to north works fine but expect occasional headwinds off the Atlantic.
Bike hire is straightforward in Porto and Viana do Castelo. Trains serve both endpoints and several towns between, so a mechanical or a change of plan does not strand you. Accommodation ranges from modest guesthouses in the fishing villages to smarter options in Viana. Water and coffee stops appear reliably every 15 to 20 kilometres.
April to June and September to October offer the most stable riding weather — July and August are manageable but crowded near the resort beaches, and winter can bring Atlantic squalls that make the exposed coastal sections genuinely uncomfortable.