Course Maps
General Optimised Swim Routes for 20 March 2021
A team of UWA researchers has combined their expertise in weather conditions, oceanography and sports science to develop the best routes for swimmers in the 2021 Port to Pub based on various start times and swim paces, as well as the predicted conditions.
The routes are coordinates in Lat and Long (decimal co-ordinates) as well as 'south offsets' from each of the rhumb line route markers and are available in .gpx format for uploading into GPS devices. The summaries can be easily printed and laminated for use by the skipper and paddler during the swim.
The paces given are initial pace for swimmer(s) in calm salt water, inclusive of rest / feed breaks. The general routes all assume an average reduction in pace of 1min/km after 10km due to fatigue.
Please choose the map and GPX files that best suit your pace. An interpolation between routes would be fine. The conditions on 20 March are significantly different to those experienced at RCS on 20 February.
25km Ultra-Marathon - Fast (15min/km)
25km Ultra-Marathon - Fast (GPX)
25km Ultra-Marathon - Slow (20min/km)
25km Ultra-Marathon - Slow (GPX)
Port to Pub Course Maps
The Port to Pub swim - 19.7km
The 19.7km Port to Pub swim starts at Leighton Beach in front of the Fremantle Surf Lifesaving Club, and finish at Rottnest Island in front of the Hotel Rottnest. The course will be clearly marked with buoys.
Course coordinates
19.7km COURSE (DEGREES.DECIMAL.MINUTES)
| Rhumb line | Latitude d m.m |
Longitude d m.m |
| Start | 32 01.723 S | 115 44.854 E |
| 4km | 32 01.275 S | 115 42.369 E |
| 7km | 32 00.938 S | 115 40.505 E |
| 10km | 32 00.601 S | 115 38.641 E |
| 11km | 32 00.488 S | 115 38.020 E |
| 12km | 32 00.376 S | 115 37.399 E |
| 13km | 32 00.263 S | 115 36.778 E |
| 14km | 32 00.151 S | 115 36.157 E |
| 15km | 32 00.038 S | 115 35.536 E |
| 16km | 31 59.925 S | 115 34.915 E |
| 17km | 31 59.812 S | 115 34.294 E |
| 18km | 31 59.811 S | 115 33.659 E |
| 19km | 31 59.802 S | 115 33.024 E |
| Finish | 31 59.859 S | 115 32.555 E |
19.7km COURSE (DEGREES.DECIMAL)
| Rhumb line | Latitude d.d |
Longitude d.d |
| Start | -32.02871 | 115.74757 |
| 4km | -32.02124 | 115.70615 |
| 7km | -32.01563 | 115.67508 |
| 10km | -32.01001 | 115.64402 |
| 11km | -32.00814 | 115.63367 |
| 12km | -32.00626 | 115.62332 |
| 13km | -32.00439 | 115.61297 |
| 14km | -32.00251 | 115.60262 |
| 15km | -32.00063 | 115.59226 |
| 16km | -31.99875 | 115.58191 |
| 17km | -31.99687 | 115.57156 |
| 18km | -31.99686 | 115.56098 |
| 19.km | -31.99670 | 115.55040 |
| Finish | -31.99766 | 115.54258 |
The Port to Pub 25km ultra-marathon
The Port to Pub 25km ultra-marathon also begins at Leighton Beach in front of the Fremantle Surf Lifesaving Club. The 25km course starts with a 5km loop along Leighton Beach before continuing onto Rottnest Island along the same course. The course will be clearly marked with buoys. The 25km ultra-marathon also finishes in front of the Hotel Rottnest.
