Austin Half Marathon course & pace calculator
The half at the Austin Marathon, starting downtown on East 2nd Street and finishing on Congress Avenue. Rolling, with the climb through the west side of the city as the main work. This profile is a Strava segment for the 2019 race, so treat it as third-party reference geometry.
- Climb
- 170 m
- Descent
- 158 m
- Low – high
- 133 m – 208 m
- Terrain at 1:30
- +1:24
- Typical start
- 8°C
- Sub-1:30 needs
- 1:28:37 flat
Course time calculator
Type h:mm:ss or use the step buttons.
8°C at your start → 9°C at the finish · dew point 4°C
Heat is scored with shade WBGT from temperature and humidity, starting to cost time above about 15°C (59°F) WBGT. Slower runners lose more because they are out longer. Wind, sun and rain are not modelled.
Certified distance only. Switch on to count the metres lost to corners, crowds and aid stations.
Same effort all the way: slower up the climbs, faster down the descents.
- Flat course
- 1:28:37
- Terrain
- +1:23
- Weather
- ±0:00
- Austin Half finish
- 1:30:00
Average 4:16 /km on course · 4:12 /km flat
Elevation profile
170 m up, 158 m down. Hover or tap the chart for the grade and your clock time at any point.
- Climb 2%+
- Climb 0.8–2%
- Flat
- Descent 0.8–2%
- Descent 2%+
- 1East 2nd Street · 0.0 km
- 2Congress Avenue finish · 21.1 km
Course splits for 1:30:00
Even-effort splits with the selected weather. Climbing and descent are per split, from the smoothed profile.
| Split | Pace | Split time | Clock | Up / down |
|---|---|---|---|---|
| 1 km | 4:13 | 4:13 | 4:13 | +4 m / −6 m |
| 2 km | 4:37 | 4:37 | 8:50 | +27 m / −0 m |
| 3 km | 4:26 | 4:26 | 13:16 | +16 m / −0 m |
| 4 km | 4:16 | 4:16 | 17:32 | +6 m / −2 m |
| 5 km | 4:24 | 4:24 | 21:55 | +14 m / −0 m |
| 6 km | 4:17 | 4:17 | 26:12 | +10 m / −7 m |
| 7 km | 4:01 | 4:01 | 30:13 | +0 m / −32 m |
| 8 km | 4:07 | 4:07 | 34:20 | +0 m / −13 m |
| 9 km | 4:08 | 4:08 | 38:28 | +1 m / −9 m |
| 10 km | 4:09 | 4:09 | 42:37 | +3 m / −16 m |
| 11 km | 4:10 | 4:10 | 46:47 | +1 m / −7 m |
| 12 km | 4:13 | 4:13 | 51:00 | +2 m / −1 m |
| 13 km | 4:19 | 4:19 | 55:19 | +8 m / −1 m |
| 14 km | 4:27 | 4:27 | 59:46 | +18 m / −0 m |
| 15 km | 4:13 | 4:13 | 1:03:59 | +3 m / −4 m |
| 16 km | 4:21 | 4:21 | 1:08:20 | +12 m / −3 m |
| 17 km | 4:14 | 4:14 | 1:12:35 | +8 m / −9 m |
| 18 km | 4:18 | 4:18 | 1:16:53 | +13 m / −8 m |
| 19 km | 4:11 | 4:11 | 1:21:04 | +5 m / −16 m |
| 20 km | 4:18 | 4:18 | 1:25:22 | +14 m / −13 m |
| 21 km | 4:14 | 4:14 | 1:29:36 | +6 m / −9 m |
| Finish | 4:07 | 0:24 | 1:30:00 | +0 m / −1 m |
Race-morning weather
Air temperature and relative humidity by hour from the first wave’s 07:00 start, from 101 mornings within three days of the race date since 2011 at AUSTIN CAMP MABRY, TX US. Cool and warm are about the 10th and 90th percentile mornings by heat stress. Median wind 9 km/h.
Part of the Austin race weekend, starting in the same morning block as the marathon; the scenarios use the marathon's start time.
| Local time | Cool | Typical | Warm |
|---|---|---|---|
| 07:00 | 0°C · 63% | 8°C · 77% | 18°C · 90% |
| 08:00 | 0°C · 66% | 8°C · 84% | 17°C · 86% |
| 09:00 | 0°C · 66% | 10°C · 77% | 17°C · 85% |
| 10:00 | 1°C · 63% | 13°C · 55% | 19°C · 78% |
| 11:00 | 2°C · 60% | 14°C · 51% | 20°C · 68% |
| 12:00 | 2°C · 62% | 15°C · 49% | 22°C · 59% |
| 13:00 | 3°C · 60% | 17°C · 37% | 24°C · 54% |
| Date | Start | +3 hours | Peak WBGT |
|---|---|---|---|
| 2025-02-09 | 13°C · 74% | 12°C · 77% | 15°C |
| 2024-02-11 | 14°C · 97% | 13°C · 84% | 18°C |
| 2023-02-12 | 1°C · 92% | 12°C · 52% | 15°C |
| 2022-02-13 | -1°C · 66% | 8°C · 35% | 12°C |
Data & method
- Route: Strava segment for the austin half (https://www.strava.com/segments/19898007), exported as GPX; user-drawn rather than organizer-published, so it is third-party reference geometry. Measured at 21.39 km and scaled to 21.0975 km.
- Elevation: USGS 3DEP 1/3 arc-second (10 m) bare-earth DEM. Sampled every 25–50 m, with bridges set to deck height and smoothed over 200–400 m.
- Weather: hourly observations from NOAA’s Integrated Surface Database (station 72254413958).
- Small climbs on flat courses can be terrain-model noise; they add only seconds to the estimates.
- This reference GPX has not been verified against the current edition. Check the organizer's latest course map before using its pacing plan.
Frequently asked questions
Is the Austin Half Marathon hilly?
The course climbs about 170 m (558 ft) and descends about 158 m in total, which is hilly by big-city standards. At even effort the terrain alone changes a 1:30 flat-course half marathon by +1:24 and a 2:00 by +1:52.
What flat-course time do I need to break 1:30 at the Austin Half Marathon?
About 1:28:37 on a flat course, assuming a typical race morning. For a sub-2 you need about 1:58:09. Switch the weather off in the calculator to see the terrain-only figure.
What is the weather usually like at the Austin Half Marathon?
On a typical race morning it is about 8°C (46°F) at the first wave’s start and 13°C (55°F) three hours later, with a dew point near 4°C. That costs a 1:30 runner about 0:00 and a 2-hour runner about 0:00. Figures come from airport observations within three days of the race date since 2011.
How is the course-adjusted time calculated?
The course is cut into 100 m pieces. Each piece is run at your flat-course pace times a grade factor (about +3.3% per 1% uphill and −1.8% per 1% downhill) and a heat factor from shade WBGT at the time you reach it. Adding the pieces gives the course time, and the calculator works backwards from a goal the same way.