18
PDI
8.3 mi
DISTANCE
2,960 ft
GAINED
6.8 %
AVG. GRADE
FULL CLIMB STATS
INTRO
Colle d'Oggia climbs 13.4 km (8.3 mi) out of the Valle Argentina, in the hills behind Liguria's Riviera dei Fiori, gaining 902 m (2,960 ft) at a 6.8% average to a pass of roughly 1160 m (3,806 ft) below Monte Grande. This western approach leaves the valley road at the Montalto Ligure turnoff above Badalucco and climbs through the two villages that make up the comune of Montalto Carpasio before topping out on the ridge that divides the Argentina and Impero valleys. It ranks #1219 on our list of the world's hardest climbs.
It is a steady, honest climb rather than a brutal one. The first few kilometers run at 5-6% between olive terraces, the middle section through Carpasio settles at 6-7%, and the hardest work comes in the upper third, where the steepest kilometer reaches 8.6% on a run of hairpins. It never rests for long, but it never really spikes either.
The appeal is how quiet it is. The road is narrow and lightly used - riders report being passed by only a car or two - and on a clear day the sea is visible from near the top. The pass itself is low-key, with no sign and only a small memorial plaque, but it sits at the heart of a web of quiet roads that link to the Impero valley, Passo Teglia and the Arroscia valley.
PLAN YOUR ROUTE
We've partnered with Sherpa-Map.com to bring you the best route planning tool. With a PRO Membership you can use this climb as a reference when creating your route. Colle d'Oggia averages 6.8% over 13.4 km (8.3 mi), and the grade builds gradually from bottom to top.
The first 3 km (1.9 mi) from the valley road are the gentlest, at 5.5-5.9% as the road climbs past Montalto Ligure through olive groves. From km 3 to km 6 the grade rises to 6.3-7.2% on the way up to Carpasio, and it holds at 6-7% through and above the village.
The upper third is the hardest part of the climb. Kilometers 9 to 11 average 8.1%, 8.1% and 7.7%, and this is where the steepest kilometer sits, at 8.6%, with the steepest 500 m at 8.9%. The steepest 5 km (3.1 mi) average 7.6%. After a brief easing to about 6% around km 12, a last 7.8% kilometer leads to the final few hundred meters at a gentler 5-6% to the pass.
Roadway: Paved the entire way. This is a narrow Ligurian mountain road, with stretches where the valley side has little or no guardrail, and some rough patches higher up. A rider report from May 2026 describes it as a clean road and well worth riding. If you continue over the top, be aware that the descent toward Borgomaro via Ville San Sebastiano is in much poorer condition than this side, so most riders return the way they came or link across to the Impero side on the wider road via San Bernardo di Conio.
Traffic: Very light. Expect residents of Montalto and Carpasio, farm vehicles and the occasional visitor - riders report being overtaken only once or twice on the whole climb. The Valle Argentina road to the start carries more traffic, especially near Taggia.
Parking: The start is a road junction on the valley floor rather than a village, so most riders base themselves in Badalucco, about 2 km (1.2 mi) down the valley - parking there is covered on our Monte Ceppo sud page - or ride up from Taggia and Arma di Taggia on the coast, a short ride down the valley.
Gear: Compact gearing is plenty for a climb whose steepest kilometer is 8.6%. The lower slopes are open olive terraces with little shade, and riders warn against tackling it at midday in summer, when riders have recorded 34 C (93 F) in late August - start early or ride it in spring or autumn. Carry a light layer for the long descent.
Provisions: Badalucco has the last shops and bars before the climb. Carpasio, about halfway up, is the last reliable water stop - fill bottles at the fountain by the church. There's another fountain about 1 km (0.6 mi) below the pass, but it's better for cooling off than drinking, and there are no services at the top.
Before heading out on any cycling adventure check out our Things to Bring on a Cycling Trip and use our interactive check list to ensure you don't forget anything.
Badalucco's painted facades and olive mills are covered on our Monte Ceppo sud page - this climb is the one that takes you into Montalto and Carpasio, two hill villages that merged into the single comune of Montalto Carpasio in 2018.
In Montalto, the church of San Giovanni Battista, founded in 1407 just outside the village walls, holds a polyptych attributed to the Ligurian Renaissance painter Ludovico Brea, dated 1516 on its reverse, along with a Resurrection by Luca Cambiaso from 1563. Higher up, at Costa di Carpasio just off the route, the Museo Storico della Resistenza occupies the former headquarters of the I Zona Liguria, the partisan command that fought the German occupation in these hills during the Second World War. Its two rooms hold weapons, equipment and photos, plus wreckage of a German plane that came down nearby - call ahead for opening hours.
From the top, the Colle d'Oggia (Borgomaro) and Passo Teglia climbs make natural links for a longer loop, and our Routes in the Area tool shows the other climbs around the Valle Argentina.
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