Portillo de la Sia (North side)
Arredondo, Cantabria, Spain
Portillo de la Sia (North side)
Distance: 21.31 km
Elevation Gain: 1102 m
Elevation Loss: 64 m
Difficulty:
788 (Hard)
FIETS Index: 5.45 FIETS
Avg Grade: 5.11 %
Max cat climb: HC
Min elevation: 161 m
Max elevation: 1226 m
Ride Category:
Climb
Puerto de La Sía is an excellent climb in the heart of the Collados de Asón Natural Park. It is essentially two climbs in one, with the road first cresting the Collado de Asón before continuing the climb to the border between Cantabria and Castilla-y-León. Rather unusually, the better scenery is found on the lower slopes, particularly during the hairpins shortly before the Collado de Asón, which offer really stunning views along the valley. The upper slopes are largely shrouded in trees, with only occasional glimpses of the beautiful green countryside.
| Rank | Rider | Date | Time | Power | W/kg | Speed |
|---|---|---|---|---|---|---|
| 🥇 | SmP | Nov 18, 2024 | 01:01:22 | 256 W | 4.41 w/kg | 20.84 km/h |
| 🥈 | sebastien rebeyrolles | Oct 24, 2025 | 01:02:29 | 288 W | 4.11 w/kg | 20.47 km/h |
| 🥉 | Mark Vos | Jan 05, 2026 | 01:02:57 | 302 W | 4.03 w/kg | 20.32 km/h |
| 4 | Jacob Stang | Dec 09, 2025 | 01:03:14 | 279 W | 3.99 w/kg | 20.23 km/h |
| 5 | Tom Smeets | Sep 17, 2025 | 01:04:05 | 288 W | 3.95 w/kg | 19.96 km/h |
| 6 | Chris | Nov 03, 2025 | 01:07:02 | 275 W | 3.68 w/kg | 19.08 km/h |
| 7 | David Marcel | Nov 16, 2025 | 01:08:09 | 295 W | 3.69 w/kg | 18.77 km/h |
| 8 | jos gent | Oct 24, 2025 | 01:08:22 | 214 W | 3.24 w/kg | 18.71 km/h |
| 9 | Юрий Ермолаев | Nov 06, 2025 | 01:11:03 | 248 W | 3.44 w/kg | 18.00 km/h |
| 10 | Alan Gunner | Jan 14, 2026 | 01:11:25 | 240 W | 3.48 w/kg | 17.91 km/h |
| 11 | Douglas Forer | Nov 06, 2025 | 01:12:12 | 281 W | 3.39 w/kg | 17.72 km/h |
| 12 | Rick Berends | Oct 25, 2025 | 01:12:20 | 221 W | 3.40 w/kg | 17.68 km/h |
| 13 | Nicolas Déry | Nov 01, 2025 | 01:12:26 | 214 W | 3.51 w/kg | 17.66 km/h |
| 14 | Rainer Klee | Nov 17, 2025 | 01:17:05 | 264 W | 3.04 w/kg | 16.59 km/h |
| 15 | javier divar | Mar 29, 2026 | 01:17:47 | 157 W | 3.02 w/kg | 16.44 km/h |
| 16 | Volker Scheid | Oct 27, 2025 | 01:17:59 | 209 W | 3.07 w/kg | 16.40 km/h |
| 17 | David Descamps | Oct 25, 2025 | 01:19:33 | 213 W | 3.13 w/kg | 16.08 km/h |
| 18 | Fabio Zanirato | Oct 27, 2025 | 01:20:53 | 174 W | 3.11 w/kg | 15.81 km/h |
| 19 | Gunnar Tojren | Nov 03, 2025 | 01:21:22 | 225 W | 2.88 w/kg | 15.72 km/h |
| 20 | jerome limosin | Jan 04, 2026 | 01:22:09 | 206 W | 2.90 w/kg | 15.57 km/h |
| 21 | filip degryse | Oct 30, 2025 | 01:23:25 | 235 W | 2.80 w/kg | 15.33 km/h |
| 22 | Jörg Schädlich | Oct 25, 2025 | 01:23:32 | 204 W | 2.87 w/kg | 15.31 km/h |
| 23 | Nick Kaldenbach | Jan 02, 2026 | 01:23:45 | 231 W | 2.82 w/kg | 15.27 km/h |
| 24 | JJosef Kluson | Apr 09, 2026 | 01:26:16 | 204 W | 2.72 w/kg | 14.83 km/h |
| 25 | Rene van Leeuwen | Nov 18, 2025 | 01:26:32 | 222 W | 2.67 w/kg | 14.78 km/h |
| 26 | Fred Gaidies | Nov 25, 2025 | 01:28:04 | 208 W | 2.63 w/kg | 14.52 km/h |
| 27 | David Martínez Soto | Nov 16, 2025 | 01:28:06 | 184 W | 2.71 w/kg | 14.52 km/h |
| 28 | AWG | Oct 24, 2025 | 01:28:48 | 192 W | 2.67 w/kg | 14.40 km/h |
| 29 | Rainer Ertl | Nov 23, 2025 | 01:29:06 | 198 W | 2.64 w/kg | 14.36 km/h |
| 30 | Ralph Schumann | Nov 04, 2025 | 01:29:33 | 183 W | 2.73 w/kg | 14.28 km/h |
| 31 | Bernhard Henrich | Nov 02, 2025 | 01:31:07 | 202 W | 2.59 w/kg | 14.04 km/h |
| 32 | Raf Van Grieken | Dec 15, 2025 | 01:31:29 | 206 W | 2.54 w/kg | 13.98 km/h |
| 33 | Mike Pearman | Jan 15, 2026 | 01:32:53 | 187 W | 2.56 w/kg | 13.77 km/h |
| 34 | Thomas Beich | Oct 24, 2025 | 01:34:29 | 189 W | 2.49 w/kg | 13.54 km/h |
| 35 | Manfred Schwarz | Nov 04, 2025 | 01:34:37 | 170 W | 2.58 w/kg | 13.52 km/h |
| 36 | Lars Ivan Johnsen | Nov 22, 2025 | 01:34:40 | 189 W | 2.52 w/kg | 13.51 km/h |
| 37 | Jan Theron | Oct 31, 2025 | 01:35:19 | 172 W | 2.46 w/kg | 13.42 km/h |
| 38 | Frederik Vanrietvelde | Nov 15, 2025 | 01:40:04 | 162 W | 2.31 w/kg | 12.78 km/h |
| 39 | Lucile CHAZAUX | Nov 01, 2025 | 01:41:04 | 165 W | 2.29 w/kg | 12.66 km/h |
| 40 | Rik Lukey | Oct 23, 2025 | 01:41:46 | 160 W | 2.37 w/kg | 12.57 km/h |
| 41 | Michael Novich | Nov 09, 2025 | 01:42:48 | 227 W | 2.13 w/kg | 12.44 km/h |
| 42 | Vasco Amorim | Nov 29, 2025 | 01:45:52 | 151 W | 2.22 w/kg | 12.08 km/h |
| 43 | Mike 8008 | Nov 29, 2025 | 01:47:23 | 179 W | 2.08 w/kg | 11.91 km/h |
| 44 | Dorus De Leeuw | Oct 26, 2025 | 01:49:30 | 182 W | 2.02 w/kg | 11.68 km/h |
| 45 | Marcel Fleischer | Nov 30, 2025 | 01:52:35 | 200 W | 2.06 w/kg | 11.36 km/h |
| 46 | Markus Geiger | Oct 28, 2025 | 01:56:05 | 153 W | 1.96 w/kg | 11.02 km/h |
| 47 | Kirby Krieger | Nov 03, 2025 | 01:57:00 | 150 W | 1.95 w/kg | 10.93 km/h |
| 48 | Berne Nyberg | Dec 08, 2025 | 02:10:55 | 139 W | 1.70 w/kg | 9.77 km/h |
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| Ride Name | Dist (km) | Elev (m) | Diff | Pop | Rating |
|---|---|---|---|---|---|
| Passo Rolle (South side) | 21.58 | 1224 | 7.02 | 253 | 4.77 |
| Port de Valldemossa | 13.58 | 507 | 2.53 | 321 | 4.75 |
| Piau-Engaly | 19.98 | 1067 | 5.67 | 145 | 4.76 |
| Silvretta (East side) | 25.63 | 694 | 2.44 | 216 | 4.69 |
| Pas de la Confession | 14.53 | 831 | 4.41 | 298 | 4.65 |