Upcoming 100 Milers

Browse thirty-one 100 milers across the US, starting in July, with races in Colorado, Kentucky, North Carolina, Texas, Virginia, and more.

100 Milers

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Other ultramarathon distances1 Mile 5K 4 Mile 8K / 5 Mile 10K 8 Mile 15K 10 Mile Half Marathon Marathon 50K 50 Mile 100K All ultramarathon races

Showing 31 events

▾

July 2026 Ultra Races

4 upcoming 100 Miles in July.

Jul

17–18

Fri–Sat

Ultra

High Lonesome 100

Co Rd 321, Nathrop, CO

100 Mile

Avg 84° / 50°·8,048 ft city elevation

Avg 84° / 50°8,048 ft city elevation

Jul

18–19

Sat–Sun

Running

Survive the Night Relays

Kroger Field, 1540 University Drive, Lexington, KY

Marathon · 50 Mile · 100 Mile

Avg 87° / 67°·994 ft city elevation

Avg 87° / 67°994 ft city elevation

Jul

24–26

Fri–Sun

Ultra

Never Summer 100km & 60km

58998 CO-14, Walden, CO

100K · 100 Mile · Ultra

Avg 77° / 39°·8,069 ft city elevation

Avg 77° / 39°8,069 ft city elevation

Jul

25–26

Sat–Sun

Running

Hawaii Kai Ultra Run XTreme 2026

555 Kealahou St, Honolulu, HI

Half Marathon · Marathon · 50K · 50 Mile · 100K · 100 Mile · Other

Avg 80° / 70°·199 ft city elevation

Avg 80° / 70°199 ft city elevation

August 2026 Ultra Races

3 upcoming 100 Miles in August.

Aug

1–2

Sat–Sun

Running

Loopy Looper

5300 N Park Drive, Pennsauken, NJ

4 Mile · 100 Mile

Avg 86° / 68°·56 ft city elevation

Avg 86° / 68°56 ft city elevation

Aug

21–23

Fri–Sun

Running

Habanero Hundred

5389 Mill Creek Rd., Cat Spring, TX

10K · Half Marathon · Marathon · 50K · 100K · 100 Mile · Ultra

Avg 95° / 73°·258 ft city elevation

Avg 95° / 73°258 ft city elevation

Aug

29–30

Sat–Sun

Ultra

Ocean State Ultra

145-151 Division Rd, West Greenwich, RI

100 Mile

Avg 80° / 59°·399 ft city elevation

Avg 80° / 59°399 ft city elevation

September 2026 Ultra Races

2 upcoming 100 Miles in September.

Sep

5–6

Sat–Sun

Ultra

Tuscazoar Endurance Race (100 miler) - Big(gerstaff) Miles for a Big(gerstaff) 40th Birthday Celebration!!

6066 Boy Scout Road, Dover, OH

100 Mile

Avg 80° / 56°·909 ft city elevation

Avg 80° / 56°909 ft city elevation

Sep

11–12

Fri–Sat

Triathlon

Smith Mountain Lake Ultra Triathlon

1235 State Park Road, Huddleston, VA

100 Mile · Ironman

Avg 81° / 61°·837 ft city elevation

Avg 81° / 61°837 ft city elevation

October 2026 Ultra Races

7 upcoming 100 Miles in October.

Oct

1–4

Thu–Sun

Running

IronHike Mohawk Mountain Fall 2026

46 Great Hollow Road, Mohawk Mtn Ski Area, Cornwall, CT

100K · 100 Mile · Ultra · Other

Avg 70° / 44°

Oct

9–11

Fri–Sun

Ultra

Indiana Trail 100

2355 E 75 S, Albion, IN

50 Mile · 100 Mile · Ultra

Avg 66° / 44°·898 ft city elevation

Avg 66° / 44°898 ft city elevation

Oct

10–11

Sat–Sun

Ultra

Anderson Lake Backyard Ultra

Anderson Lake West State Forest Campground, Gwinn, MI

100 Mile

Avg 56° / 37°·1,153 ft city elevation

Avg 56° / 37°1,153 ft city elevation

Oct

10–11

Sat–Sun

Running

Wolverine State 100

101 E Lake St, Petoskey, MI

50K · 100K · 100 Mile

Avg 59° / 41°·839 ft city elevation

Avg 59° / 41°839 ft city elevation

Oct

16–20

Fri–Tue

Running

Little Rooster Run

4476 US-127 Glencoe, KY

5K · 100 Mile · Other

Avg 67° / 42°·677 ft city elevation

Avg 67° / 42°677 ft city elevation

Oct

Sat

Running

Sadlers Creek Stumble (32 Hour - 26.2 - 13.1 - 10k)

940 Sadlers Creek Rd, Anderson, SC

10K · Half Marathon · Marathon · 100 Mile

Avg 73° / 51°·749 ft city elevation

Avg 73° / 51°749 ft city elevation

Oct

17–18

Sat–Sun

Ultra

HKY 100 Mile Ultra Trail Race

2500 Clement Blvd. NW, Hickory, NC

100 Mile

Avg 70° / 48°·1,062 ft city elevation

Avg 70° / 48°1,062 ft city elevation

November 2026 Ultra Races

5 upcoming 100 Miles in November.

Nov

6–7

Fri–Sat

Ultra

Lynchburg UltraFest

2238 Rivermont Avenue, Lynchburg, VA

100 Mile

Avg 62° / 35°·843 ft city elevation

Avg 62° / 35°843 ft city elevation

Nov

7–9

Sat–Mon

Running

Ponderosa Polar Challenge 2026

Twin Knolls Rd, Orderville, UT

5K · 10K · Half Marathon · Marathon · 50K · 50 Mile · 100K · 100 Mile · Ultra

Avg 60° / 28°·5,453 ft city elevation

Avg 60° / 28°5,453 ft city elevation

Nov

Sat

Ultra

Creek Trail Crusher

309 Carroll Road, Paragould, AR

50 Mile · 100 Mile · Other

Avg 60° / 39°·275 ft city elevation

Avg 60° / 39°275 ft city elevation

Nov

27–28

Fri–Sat

Ultra

Sunset 6/12/24 Hour Endurance Challenge

Sunset Lake, Benton, AR

50K · 50 Mile · 100 Mile

Avg 60° / 37°·283 ft city elevation

Avg 60° / 37°283 ft city elevation

Nov

27–28

Fri–Sat

Running

Colorado River Run 100 Mile • 50 Mile • 50K • Marathon • Half Marathon • 10K • 5K

4000 Shaw Dr., Marble Falls, TX

5K · 10K · Half Marathon · Marathon · 50K · 50 Mile · 100 Mile

Avg 65° / 43°·806 ft city elevation

Avg 65° / 43°806 ft city elevation

December 2026 Ultra Races

2 upcoming 100 Miles in December.

Dec

5–6

Sat–Sun

Running

Last Chance Ultra

6176 S State Hwy VV, Rogersville, MO

10 Mile · 50K · 50 Mile · 100K · 100 Mile

Avg 50° / 28°·1,424 ft city elevation

Avg 50° / 28°1,424 ft city elevation

Dec

5–6

Sat–Sun

Running

Crooked Creek Ultra Trail Race

Harry S. Frazier Scout Reservation, Shepherdsville, KY

Half Marathon · Marathon · 50 Mile · 100 Mile

Avg 51° / 32°·455 ft city elevation

Avg 51° / 32°455 ft city elevation

January 2027 Ultra Races

1 upcoming 100 Mile in January.

Jan

15–16

Fri–Sat

Running

Southern Tour Ultra

11471 U.S. 17, Wilmington, NC

50K · 50 Mile · 100 Mile

Avg 56° / 36°·38 ft city elevation

Avg 56° / 36°38 ft city elevation

February 2027 Ultra Races

2 upcoming 100 Miles in February.

Feb

20–21

Sat–Sun

Running

Sandhills Trail Race Series (30 Hour - 50k - 25k - 7.5 Mile)

9564 Two Notch Rd, Columbia, SC

50K · 100 Mile · Other

Avg 65° / 41°·290 ft city elevation

Avg 65° / 41°290 ft city elevation

Feb

26–28

Fri–Sun

Ultra

Grandmaster Ultras 2027

501 Hillside Dr, Mesquite, NV

50K · 50 Mile · 100K · 100 Mile

Avg 68° / 37°·1,622 ft city elevation

Avg 68° / 37°1,622 ft city elevation

March 2027 Ultra Races

2 upcoming 100 Miles in March.

Mar

6–7

Sat–Sun

Running

Holly Springs Race Against the Sun

Grigsby Avenue, Holly Springs, NC

100 Mile

Avg 59° / 34°·445 ft city elevation

Avg 59° / 34°445 ft city elevation

Mar

13–14

Sat–Sun

Running

The Pistol

636 Vose Road, Alcoa, TN

10 Mile · 50K · 50 Mile · 100K · 100 Mile · Ultra · Other

Avg 60° / 39°·835 ft city elevation

Avg 60° / 39°835 ft city elevation

April 2027 Ultra Races

2 upcoming 100 Miles in April.

Apr

Sun

Ultra

NoCo Urban Ultra & Relay

4936 W County Rd 52 E, Bellvue, CO

50 Mile · 100 Mile

Avg 51° / 29°·6,647 ft city elevation

Avg 51° / 29°6,647 ft city elevation

Apr

17–18

Sat–Sun

Running

Silver Moon Race: Kings River

995 N Reed Ave, Reedley, CA

100 Mile · Other

Avg 80° / 49°·351 ft city elevation

Avg 80° / 49°351 ft city elevation

June 2027 Ultra Races

1 upcoming 100 Mile in June.

Jun

4–6

Fri–Sun

Running

Rabid Raccoon 100

Brady's Run Park, 121 Brady's Run Rd, Beaver Falls, PA

5K · Half Marathon · Marathon · 100K · 100 Mile · Ultra · Other

Avg 76° / 54°·1,168 ft city elevation

Avg 76° / 54°1,168 ft city elevation

Filter by

Other ultramarathon distances1 Mile 5K 4 Mile 8K / 5 Mile 10K 8 Mile 15K 10 Mile Half Marathon Marathon 50K 50 Mile 100K All ultramarathon races

Showing 31 events

▾

July 2026 Ultra Races

4 upcoming 100 Miles in July.

Jul

17–18

Fri–Sat

Ultra

High Lonesome 100

Co Rd 321, Nathrop, CO

100 Mile

Avg 84° / 50°·8,048 ft city elevation

Avg 84° / 50°8,048 ft city elevation

Jul

18–19

Sat–Sun

Running

Survive the Night Relays

Kroger Field, 1540 University Drive, Lexington, KY

Marathon · 50 Mile · 100 Mile

Avg 87° / 67°·994 ft city elevation

Avg 87° / 67°994 ft city elevation

Jul

24–26

Fri–Sun

Ultra

Never Summer 100km & 60km

58998 CO-14, Walden, CO

100K · 100 Mile · Ultra

Avg 77° / 39°·8,069 ft city elevation

Avg 77° / 39°8,069 ft city elevation

Jul

25–26

Sat–Sun

Running

Hawaii Kai Ultra Run XTreme 2026

555 Kealahou St, Honolulu, HI

Half Marathon · Marathon · 50K · 50 Mile · 100K · 100 Mile · Other

Avg 80° / 70°·199 ft city elevation

Avg 80° / 70°199 ft city elevation

August 2026 Ultra Races

3 upcoming 100 Miles in August.

Aug

1–2

Sat–Sun

Running

Loopy Looper

5300 N Park Drive, Pennsauken, NJ

4 Mile · 100 Mile

Avg 86° / 68°·56 ft city elevation

Avg 86° / 68°56 ft city elevation

Aug

21–23

Fri–Sun

Running

Habanero Hundred

5389 Mill Creek Rd., Cat Spring, TX

10K · Half Marathon · Marathon · 50K · 100K · 100 Mile · Ultra

Avg 95° / 73°·258 ft city elevation

Avg 95° / 73°258 ft city elevation

Aug

29–30

Sat–Sun

Ultra

Ocean State Ultra

145-151 Division Rd, West Greenwich, RI

100 Mile

Avg 80° / 59°·399 ft city elevation

Avg 80° / 59°399 ft city elevation

September 2026 Ultra Races

2 upcoming 100 Miles in September.

Sep

5–6

Sat–Sun

Ultra

Tuscazoar Endurance Race (100 miler) - Big(gerstaff) Miles for a Big(gerstaff) 40th Birthday Celebration!!

6066 Boy Scout Road, Dover, OH

100 Mile

Avg 80° / 56°·909 ft city elevation

Avg 80° / 56°909 ft city elevation

Sep

11–12

Fri–Sat

Triathlon

Smith Mountain Lake Ultra Triathlon

1235 State Park Road, Huddleston, VA

100 Mile · Ironman

Avg 81° / 61°·837 ft city elevation

Avg 81° / 61°837 ft city elevation

October 2026 Ultra Races

7 upcoming 100 Miles in October.

Oct

1–4

Thu–Sun

Running

IronHike Mohawk Mountain Fall 2026

46 Great Hollow Road, Mohawk Mtn Ski Area, Cornwall, CT

100K · 100 Mile · Ultra · Other

Avg 70° / 44°

Oct

9–11

Fri–Sun

Ultra

Indiana Trail 100

2355 E 75 S, Albion, IN

50 Mile · 100 Mile · Ultra

Avg 66° / 44°·898 ft city elevation

Avg 66° / 44°898 ft city elevation

Oct

10–11

Sat–Sun

Ultra

Anderson Lake Backyard Ultra

Anderson Lake West State Forest Campground, Gwinn, MI

100 Mile

Avg 56° / 37°·1,153 ft city elevation

Avg 56° / 37°1,153 ft city elevation

Oct

10–11

Sat–Sun

Running

Wolverine State 100

101 E Lake St, Petoskey, MI

50K · 100K · 100 Mile

Avg 59° / 41°·839 ft city elevation

Avg 59° / 41°839 ft city elevation

Oct

16–20

Fri–Tue

Running

Little Rooster Run

4476 US-127 Glencoe, KY

5K · 100 Mile · Other

Avg 67° / 42°·677 ft city elevation

Avg 67° / 42°677 ft city elevation

Oct

Sat

Running

Sadlers Creek Stumble (32 Hour - 26.2 - 13.1 - 10k)

940 Sadlers Creek Rd, Anderson, SC

10K · Half Marathon · Marathon · 100 Mile

Avg 73° / 51°·749 ft city elevation

Avg 73° / 51°749 ft city elevation

Oct

17–18

Sat–Sun

Ultra

HKY 100 Mile Ultra Trail Race

2500 Clement Blvd. NW, Hickory, NC

100 Mile

Avg 70° / 48°·1,062 ft city elevation

Avg 70° / 48°1,062 ft city elevation

November 2026 Ultra Races

5 upcoming 100 Miles in November.

Nov

6–7

Fri–Sat

Ultra

Lynchburg UltraFest

2238 Rivermont Avenue, Lynchburg, VA

100 Mile

Avg 62° / 35°·843 ft city elevation

Avg 62° / 35°843 ft city elevation

Nov

7–9

Sat–Mon

Running

Ponderosa Polar Challenge 2026

Twin Knolls Rd, Orderville, UT

5K · 10K · Half Marathon · Marathon · 50K · 50 Mile · 100K · 100 Mile · Ultra

Avg 60° / 28°·5,453 ft city elevation

Avg 60° / 28°5,453 ft city elevation

Nov

Sat

Ultra

Creek Trail Crusher

309 Carroll Road, Paragould, AR

50 Mile · 100 Mile · Other

Avg 60° / 39°·275 ft city elevation

Avg 60° / 39°275 ft city elevation

Nov

27–28

Fri–Sat

Ultra

Sunset 6/12/24 Hour Endurance Challenge

Sunset Lake, Benton, AR

50K · 50 Mile · 100 Mile

Avg 60° / 37°·283 ft city elevation

Avg 60° / 37°283 ft city elevation

Nov

27–28

Fri–Sat

Running

Colorado River Run 100 Mile • 50 Mile • 50K • Marathon • Half Marathon • 10K • 5K

4000 Shaw Dr., Marble Falls, TX

5K · 10K · Half Marathon · Marathon · 50K · 50 Mile · 100 Mile

Avg 65° / 43°·806 ft city elevation

Avg 65° / 43°806 ft city elevation

December 2026 Ultra Races

2 upcoming 100 Miles in December.

Dec

5–6

Sat–Sun

Running

Last Chance Ultra

6176 S State Hwy VV, Rogersville, MO

10 Mile · 50K · 50 Mile · 100K · 100 Mile

Avg 50° / 28°·1,424 ft city elevation

Avg 50° / 28°1,424 ft city elevation

Dec

5–6

Sat–Sun

Running

Crooked Creek Ultra Trail Race

Harry S. Frazier Scout Reservation, Shepherdsville, KY

Half Marathon · Marathon · 50 Mile · 100 Mile

Avg 51° / 32°·455 ft city elevation

Avg 51° / 32°455 ft city elevation

January 2027 Ultra Races

1 upcoming 100 Mile in January.

Jan

15–16

Fri–Sat

Running

Southern Tour Ultra

11471 U.S. 17, Wilmington, NC

50K · 50 Mile · 100 Mile

Avg 56° / 36°·38 ft city elevation

Avg 56° / 36°38 ft city elevation

February 2027 Ultra Races

2 upcoming 100 Miles in February.

Feb

20–21

Sat–Sun

Running

Sandhills Trail Race Series (30 Hour - 50k - 25k - 7.5 Mile)

9564 Two Notch Rd, Columbia, SC

50K · 100 Mile · Other

Avg 65° / 41°·290 ft city elevation

Avg 65° / 41°290 ft city elevation

Feb

26–28

Fri–Sun

Ultra

Grandmaster Ultras 2027

501 Hillside Dr, Mesquite, NV

50K · 50 Mile · 100K · 100 Mile

Avg 68° / 37°·1,622 ft city elevation

Avg 68° / 37°1,622 ft city elevation

March 2027 Ultra Races

2 upcoming 100 Miles in March.

Mar

6–7

Sat–Sun

Running

Holly Springs Race Against the Sun

Grigsby Avenue, Holly Springs, NC

100 Mile

Avg 59° / 34°·445 ft city elevation

Avg 59° / 34°445 ft city elevation

Mar

13–14

Sat–Sun

Running

The Pistol

636 Vose Road, Alcoa, TN

10 Mile · 50K · 50 Mile · 100K · 100 Mile · Ultra · Other

Avg 60° / 39°·835 ft city elevation

Avg 60° / 39°835 ft city elevation

April 2027 Ultra Races

2 upcoming 100 Miles in April.

Apr

Sun

Ultra

NoCo Urban Ultra & Relay

4936 W County Rd 52 E, Bellvue, CO

50 Mile · 100 Mile

Avg 51° / 29°·6,647 ft city elevation

Avg 51° / 29°6,647 ft city elevation

Apr

17–18

Sat–Sun

Running

Silver Moon Race: Kings River

995 N Reed Ave, Reedley, CA

100 Mile · Other

Avg 80° / 49°·351 ft city elevation

Avg 80° / 49°351 ft city elevation

June 2027 Ultra Races

1 upcoming 100 Mile in June.

Jun

4–6

Fri–Sun

Running

Rabid Raccoon 100

Brady's Run Park, 121 Brady's Run Rd, Beaver Falls, PA

5K · Half Marathon · Marathon · 100K · 100 Mile · Ultra · Other

Avg 76° / 54°·1,168 ft city elevation

Avg 76° / 54°1,168 ft city elevation