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Race Overview
The Grasslands Trail Run is held in the Lyndon B. Johnson National Grasslands, more than 20,000 acres managed by the U.S. Forest Service and situated north of Fort Worth. The trails loop among rolling hills and through a mixture of pine and oak grove forests, open fields, and livestock. Run the 100-Mile, 50-Mile, Marathon, Half marathon (Saturday Start) or 15K (Sunday Start) and enjoy the beauty of the Grasslands while sharing the trails with horses and running past cows—don’t let the cows out!
WikipediaFAQ
When is the 2026 Grasslands Trail Run Marathon?
The 2026 Grasslands Trail Run Marathon will be held on Saturday March 21, 2026.
Is the Grasslands Trail Run Marathon a Boston Marathon Qualfier?
No, the Grasslands Trail Run Marathon is NOT a Boston Marathon qualifier.
Grasslands Trail Run Marathon Weather History
Grasslands Trail Run Marathon Weather Averages
Average Temp: 57°, Average Low: 48°, Average High: 67°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 49° | 50° | 52° | 55° | 58° | 60° | 62° | 63° |
| Feel | 48° | 48° | 50° | 54° | 57° | 59° | 61° | 62° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 6mph | 6mph | 7mph | 9mph | 9mph | 9mph | 9mph | 10mph |
| Dew | 40° | 41° | 42° | 43° | 43° | 42° | 42° | 42° |
| RunScore |  | | | | | |  | |
Grasslands Trail Run Marathon 2025
Mar 15, 2025
Partly cloudy throughout the day.
Low: 51°, High: 65°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  57° | 55° | 53° |  55° | 59° | 61° | 61° | 62° |
| Feel | 57° | 55° | 53° | 55° | 59° | 61° | 61° | 62° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 6mph | 5mph | 8mph | 8mph | 11mph | 9mph | 13mph |
| Dew | 16° | 19° | 25° | 34° | 38° | 38° | 37° | 36° |
| RunScore |  | | | | | | | |
Grasslands Trail Run Marathon 2024
Mar 16, 2024
Partly cloudy throughout the day with rain.
Low: 50°, High: 58°, Heavy Rain
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 52° | 53° | 54° | 56° | 57° |  56° | 56° | 57° |
| Feel | 52° | 53° | 54° | 56° | 57° | 56° | 56° | 57° |
| Rain | - | - | - | - | - | moderate | light | moderate |
| Wind | 3mph | 5mph | 7mph | 9mph | 9mph | 7mph | 9mph | 4mph |
| Dew | 48° | 48° | 49° | 51° | 53° | 55° | 56° | 56° |
| RunScore | | | | | |  | | |
Grasslands Trail Run Marathon 2023
Mar 18, 2023
Clear conditions throughout the day.
Low: 38°, High: 52°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  38° | 38° | 41° | 42° | 43° | 46° | 50° | 52° |
| Feel | 38° | 35° | 36° | 36° | 38° | 40° | 45° | 52° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 3mph | 7mph | 10mph | 10mph | 13mph | 13mph | 11mph |
| Dew | 25° | 25° | 26° | 25° | 23° | 22° | 22° | 18° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2022
Mar 19, 2022
Clear conditions throughout the day.
Low: 43°, High: 74°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 45° | 43° | 50° | 55° | 61° | 66° | 69° | 71° |
| Feel | 42° | 40° | 47° | 55° | 61° | 66° | 69° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 6mph | 7mph | 11mph | 10mph | 10mph | 6mph | 7mph |
| Dew | 23° | 27° | 28° | 29° | 29° | 24° | 23° | 22° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2021
Mar 20, 2021
Clear conditions throughout the day.
Low: 43°, High: 68°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 44° | 43° | 46° | 50° | 56° | 60° | 62° | 64° |
| Feel | 42° | 39° | 41° | 50° | 56° | 60° | 62° | 64° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 6mph | 9mph | 7mph | 6mph | 7mph | 6mph | 5mph |
| Dew | 33° | 33° | 35° | 38° | 38° | 37° | 35° | 35° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2019
Mar 16, 2019
Clear conditions throughout the day.
Low: 38°, High: 59°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 38° | 38° | 43° | 49° | 51° | 54° | 54° | 56° |
| Feel | 36° | 38° | 40° | 45° | 51° | 54° | 54° | 56° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 2mph | 5mph | 8mph | 7mph | 8mph | 5mph | 8mph |
| Dew | 21° | 22° | 24° | 22° | 20° | 21° | 20° | 23° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2018
Mar 17, 2018
Clear conditions throughout the day.
Low: 53°, High: 72°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 53° | 53° | 54° | 57° | 60° | 64° | 69° | 69° |
| Feel | 53° | 53° | 54° | 57° | 60° | 64° | 69° | 69° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 7mph | 6mph | 8mph | 12mph | 9mph | 5mph | 9mph | 7mph |
| Dew | 32° | 33° | 35° | 36° | 36° | 37° | 38° | 39° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2017
Mar 18, 2017
Clearing in the afternoon.
Low: 60°, High: 83°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 60° | 60° | 64° | 68° | 71° | 75° | 79° | 81° |
| Feel | 60° | 60° | 64° | 68° | 71° | 75° | 79° | 82° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 3mph | 8mph | 6mph | 3mph | 3mph | 7mph | 9mph |
| Dew | 59° | 59° | 61° | 62° | 63° | 63° | 63° | 62° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2016
Mar 19, 2016
Clear conditions throughout the day.
Low: 37°, High: 57°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 37° | 37° | 40° | 44° | 48° | 50° | 53° | 56° |
| Feel | 31° | 32° | 34° | 38° | 43° | 50° | 53° | 56° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 8mph | 7mph | 9mph | 12mph | 11mph | 12mph | 14mph | 10mph |
| Dew | 31° | 31° | 30° | 28° | 27° | 27° | 26° | 25° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2015
Mar 21, 2015
Partly cloudy throughout the day with rain.
Low: 50°, High: 59°, Moderate Rain
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 50° | 50° | 51° | 53° | 55° | 56° | 57° | 58° |
| Feel | 50° | 50° | 51° | 53° | 55° | 56° | 57° | 58° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 0mph | 0mph | 5mph | 5mph | 3mph | 7mph |
| Dew | 49° | 49° | 49° | 50° | 50° | 50° | 50° | 52° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2014
Mar 22, 2014
Cloudy skies throughout the day.
Low: 50°, High: 65°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 59° | 57° | 57° | 56° | 55° | 54° | 53° | 53° |
| Feel | 59° | 57° | 57° | 56° | 55° | 54° | 53° | 53° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 13mph | 16mph | 14mph | 11mph | 11mph | 11mph | 10mph | 9mph |
| Dew | 34° | 35° | 35° | 36° | 36° | 37° | 38° | 40° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2013
Mar 23, 2013
Cloudy skies throughout the day with rain.
Low: 41°, High: 50°, Moderate Rain
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 41° | 42° | 43° | 45° | 46° | 48° | 49° | 48° |
| Feel | 38° | 37° | 39° | 42° | 42° | 45° | 49° | 46° |
| Rain | light | light | - | light | - | - | - | - |
| Wind | 4mph | 9mph | 6mph | 5mph | 8mph | 8mph | 1mph | 6mph |
| Dew | 41° | 42° | 43° | 45° | 46° | 46° | 47° | 47° |
| RunScore | |  | | | | | | |
Grasslands Trail Run Marathon 2012
Mar 24, 2012
Clear conditions throughout the day.
Low: 51°, High: 77°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 51° | 52° | 58° | 63° | 67° | 69° | 72° | 72° |
| Feel | 51° | 52° | 58° | 63° | 67° | 69° | 72° | 72° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 6mph | 5mph | 3mph | 4mph | 6mph | 8mph | 8mph | 9mph |
| Dew | 45° | 45° | 46° | 50° | 50° | 48° | 51° | 51° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2011
Mar 19, 2011
Clear conditions throughout the day.
Low: 61°, High: 82°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 63° | 64° | 66° | 67° | 71° | 75° | 80° | 82° |
| Feel | 63° | 64° | 66° | 67° | 71° | 75° | 80° | 81° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 6mph | 7mph | 10mph | 11mph | 12mph | 10mph | 16mph | 19mph |
| Dew | 59° | 60° | 60° | 59° | 59° | 59° | 58° | 57° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2010
Mar 20, 2010
Cloudy skies throughout the day with rain or snow clearing later.
Low: 31°, High: 63°, Heavy Rain
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 35° | 33° | 33° | 32° | 33° | 33° | 34° | 34° |
| Feel | 26° | 22° | 23° | 21° | 21° | 22° | 22° | 23° |
| Rain | light | light | - | - | - | - | - | - |
| Wind | 15mph | 20mph | 15mph | 17mph | 20mph | 18mph | 20mph | 17mph |
| Dew | 33° | 32° | 31° | 30° | 29° | 29° | 29° | 26° |
| RunScore |  |  |  | | | | | |
Grasslands Trail Run Marathon 2009
Mar 21, 2009
Clear conditions throughout the day.
Low: 56°, High: 75°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 56° | 59° | 63° | 65° | 67° | 67° | 71° |
| Feel | 56° | 56° | 59° | 63° | 65° | 67° | 67° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 6mph | 4mph | 8mph | 10mph | 11mph | 9mph | 11mph | 16mph |
| Dew | 50° | 50° | 51° | 51° | 47° | 47° | 47° | 46° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2008
Mar 22, 2008
Clear conditions throughout the day.
Low: 42°, High: 72°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 45° | 42° | 52° | 59° | 63° | 65° | 69° | 71° |
| Feel | 43° | 42° | 52° | 59° | 63° | 65° | 69° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 2mph | 3mph | 12mph | 11mph | 12mph | 11mph | 10mph |
| Dew | 33° | 34° | 38° | 33° | 31° | 31° | 30° | 29° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2007
Mar 24, 2007
Partly cloudy throughout the day.
Low: 61°, High: 75°
| Time | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 63° | 63° | 61° | 63° | 65° | 70° | 72° | 75° |
| Feel | 63° | 63° | 61° | 63° | 65° | 70° | 72° | 75° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 11mph | 5mph | 10mph | 18mph | 16mph | 22mph | 15mph | 17mph |
| Dew | 59° | 59° | 59° | 59° | 59° | 57° | 57° | 57° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2006
Mar 25, 2006
Clear conditions throughout the day.
Low: 37°, High: 65°
| Time | 6AM | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 39° | 37° | 41° | 47° | 54° | 60° | 59° | 61° |
| Feel | 36° | 34° | 39° | 45° | 54° | 60° | 59° | 61° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 5mph | 3mph | 3mph | 0mph | 2mph | 0mph | 3mph |
| Dew | 32° | 32° | 34° | 36° | 34° | 33° | 32° | 32° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2005
Mar 26, 2005
Partly cloudy throughout the day with a chance of rain throughout the day.
Low: 45°, High: 53°, Heavy Rain
| Time | 6AM | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 46° | 47° | 47° | 47° | 47° | 47° | 48° | 49° |
| Feel | 42° | 42° | 42° | 43° | 40° | 43° | 43° | 45° |
| Rain | moderate | moderate | moderate | moderate | light | light | moderate | light |
| Wind | 9mph | 10mph | 10mph | 9mph | 14mph | 10mph | 11mph | 10mph |
| Dew | 45° | 45° | 46° | 46° | 45° | 46° | 46° | 46° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2004
Mar 20, 2004
Partly cloudy throughout the day with late afternoon rain.
Low: 66°, High: 84°, Heavy Rain
| Time | 6AM | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 69° | 69° | 70° | 72° | 74° | 78° | 79° | 81° |
| Feel | 69° | 69° | 70° | 72° | 74° | 78° | 79° | 83° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 15mph | 12mph | 15mph | 15mph | 16mph | 14mph | 13mph | 9mph |
| Dew | 65° | 65° | 65° | 66° | 66° | 66° | 66° | 65° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2003
Mar 22, 2003
Partly cloudy throughout the day with rain.
Low: 46°, High: 58°, Moderate Rain
| Time | 6AM | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 47° | 47° | 49° | 52° | 56° | 58° | 58° | 57° |
| Feel | 47° | 47° | 49° | 52° | 56° | 58° | 58° | 57° |
| Rain | - | - | - | - | - | - | - | light |
| Wind | 2mph | 0mph | 3mph | 2mph | 3mph | 5mph | 10mph | 10mph |
| Dew | 44° | 45° | 47° | 47° | 47° | 46° | 49° | 49° |
| RunScore | | | | | | | | |
Grasslands Trail Run Marathon 2001
Mar 31, 2001
Partly cloudy throughout the day with early morning rain.
Low: 46°, High: 71°, Light Rain
| Time | 6AM | 7AM | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 49° | 46° | 52° | 54° | 62° | 64° | 65° | 70° |
| Feel | 49° | 46° | 52° | 54° | 62° | 64° | 65° | 70° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 2mph | 2mph | 4mph | 1mph | 3mph | 5mph | 3mph | 9mph |
| Dew | 48° | 46° | 51° | 53° | 57° | 61° | 56° | 58° |
| RunScore | | | | | | | | |