The Arrowhead Endurance Run returns to Johnston City, Illinois on October 10th through the morning of November 11th for a weekend of endurance racing around Arrowhead Lake Campground. The event features various distances including 6-hour, 12-hour daytime and nighttime races, as well as a full 24-hour race with relay options, all held in and around Johnston City. Race day begins early at the campground, located about fifteen minutes north of Marion, Illinois on Peterson Avenue. Runners gather for packet pickup at the pavilion near the boat dock starting from 5:30 AM, preparing themselves for a challenging course that loops around Arrowhead Lake. The trail is mostly gravel with a concrete section up the boat ramp and offers less than fifty feet in elevation change per loop. This terrain supports fast times and big mileage totals as seen in previous years. Since its inception two years ago, the Arrowhead Endurance Run has become an important event for endurance athletes seeking to challenge themselves on this scenic course around Arrowhead Lake. Participants can look forward to a fully certified 2.07-mile loop with chip timing by SoILL Racing. The race raises funds and awareness for local causes while also celebrating athletic achievement, as evidenced by the awards given to overall winners in each distance category. The Arrowhead Endurance Run's course winds through Johnston City’s Arrowhead Lake Campground on a certified 2.07-mile loop that is mostly gravel with some concrete near the boat ramp. The terrain features minimal elevation change and supports fast times across multiple loops, ideal for endurance racing. Aid stations are set up at the start/finish area throughout each race day. Weather conditions in Johnston City during October typically feature an average temperature of 16.7°C with a range from 11.5°C to 21.9°C and feels like temperatures staying consistent around these averages due to moderate humidity levels of approximately 65%. The UV index is rated as moderate at 4.0, providing some sun exposure but not extreme conditions for outdoor activities.
12 hour - NIGHT TIME 12 Hours • Start: 19:00:00 • Fee: $110.00
The Arrowhead Endurance Run includes a variety of race distances such as the 12-hour daytime and nighttime races, each with their own start times; the full 24 Hour event and its relay counterpart; plus shorter options like the 6hr run and even a compact yet challenging 3 hour race. Each distance attracts different levels of endurance enthusiasts looking to push themselves on this certified course. For those interested in participating, registration can be completed online at https://ultrasignup.com/register.aspx?did=131284 with fees ranging from $65 for the shortest event up to $250 for relay teams. Packet pickup takes place near the start/finish area on Saturday morning before race day starts. Runners should plan to attend packet pickup at Arrowhead Lake Campground, located next to the boat dock by 1600 Peterson Ave in Johnston City starting from 5:30 AM. All participants must be present with valid photo ID for bib collection and will receive their entry fee confirmation email containing race day details. The Arrowhead Endurance Run in Johnston City offers a unique opportunity for endurance runners to challenge themselves on scenic loops around Arrowhead Lake, culminating over the weekend of October 10th through November 11th. With its mix of distance options and supportive community atmosphere, this event stands out as a worthwhile addition to any athlete's calendar.
Races Offered
12hrs
Oct 10, 2026
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Distance —
12 Hours
terrain
Type —
Running
timer
07:00
sell
$110.00
24 Hour
Oct 10, 2026
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Distance —
24 Hours
terrain
Type —
Running
timer
07:00
sell
$150.00
24 Hour Relay
Oct 10, 2026
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Distance —
24 Hours
terrain
Type —
Running
timer
07:00
sell
$250.00
6hrs
Oct 10, 2026
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Distance —
6 Hours
terrain
Type —
Running
timer
08:00
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$80.00
3 Hour Race
Oct 10, 2026
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Distance —
3 Hours
terrain
Type —
Running
timer
09:00
sell
$65.00
12 hour - NIGHT TIME
Oct 10, 2026
straighten
Distance —
12 Hours
terrain
Type —
Running
timer
19:00
sell
$110.00
Weather History
These values represent the 3-year monthly averages for October in Johnston City.
thermostatTemperature
11.5° / 21.9°
wb_sunnyFeels like
9.1° / 19.7°
light_mode
Avg sunshine hours
9h 9m
water_drop
Avg rainfall
1.8 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
11.1 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
65.7%
wb_twilight
Sunrise
07:05
nightlight
Sunset
18:16
About Johnston City
Learn more about the host city, Johnston City.
Johnston City is a city in Williamson County, Illinois, United States. The population was 3,348 at the 2020 census. This was a center of coal mining in the early 20th century, having a peak of population in the 1920s. The mining jobs attracted many immigrants from Europe.
