2023 Biggest ultra running races

By finisher count. North American races only.
Finishers Event Winner
411

Mountain Mist

Jan 28 / 50 KM / Huntsville AL
384

Avalon Benefit 50

Jan 07 / 50 KM / Avalon CA
320

Bandera

Jan 07 / 100 KM / Bandera TX
233

Avalon Benefit 50

Jan 07 / 50 Miles / Avalon CA
187

Arches Ultra

Jan 28 / 50 KM / Moab UT
181

DARK ANCHOR

Jan 20 / 34 Hours / Savannah GA
139

Orcas Island 50k

Jan 28 / 50 KM / Orcas Island WA
128

Bandera

Jan 08 / 50 KM / Bandera TX
110

Long Haul 100

Jan 14 / 100 Miles / Wesley Chapel FL
99

Sean O'Brien 100k/50M

Jan 28 / 50 KM / Malibu CA
99

Sean O'Brien 50k

Jan 28 / 50 KM / Malibu CA
92

Salem Lakeshore Frosty Fifty

Jan 07 / 50 KM / Winston-Salem NC
91

Sean O'Brien 100k/50M

Jan 28 / 100 KM / Malibu CA
89

Frozen Gnome

Jan 14 / 50 KM / Crystal Lake IL
86

Fort Ord Trail Run

Jan 28 / 50 KM / Monterey CA
84

Phunt 50KM Trail Race

Jan 14 / 50 KM / Elkton MD
84

Coldwater Rumble

Jan 14 / 52 KM / Goodyear AZ
81

Croom Zoom

Jan 07 / 50 KM / Brooksville FL
78

Southern Tour Ultra

Jan 20 / 50 KM / Wilmington NC
78

San Diego 50 and Trail Marathon

Jan 28 / 50 Miles / Escondido CA
76

Bandera

Jan 07 / 50 KM / Bandera TX
74

Clearwater Running Festival

Jan 28 / 50 KM / Clearwater FL
73

NC Fat Ass 50k

Jan 28 / 50 KM / Ellerbee NC
67

Capitol Peak Mega Fat Ass

Jan 21 / 34 Miles / Olympia WA
67

Sean O'Brien 100k/50M

Jan 28 / 50 Miles / Malibu CA
67

Atlanta Fat Ass 50K

Jan 08 / 50 KM / Lithia Springs GA
66

AZT Oracle Rumble

Jan 28 / 50 KM / Tucson AZ
65

Arches Ultra

Jan 28 / 50 Miles / Moab UT
62

Calico Trail Run

Jan 22 / 50 KM / Barstow CA
62

South Mountains Marathons

Jan 07 / 50 KM / Connelly Springs NC
59

Sandy Bottom 8-Hour

Jan 07 / 8 Hours / Hampton VA
57

Coldwater Rumble

Jan 14 / 100 Miles / Goodyear AZ
56

HURT 100

Jan 14 / 100 Miles / Honolulu HI
53

Wilson Creek Frozen 50K

Jan 21 / 50 KM / Melba ID
49

San Tan Scramble

Jan 07 / 50 KM / Queen Creek AZ
47

Snow Bird Challenge

Jan 21 / 50 KM / Seneca SC
46

Rocks and Roots Trail Series #1

Jan 15 / 50 KM / Alum Creek State Park OH
43

David's Trail Endurance Run

Jan 21 / 50 KM / Mountain Home AR
43

Running the Rose

Jan 28 / 54 KM / Tyler TX
43

The Great Scorpion Trail Run

Jan 07 / 50 KM / Meridian MS
42

Waterfall 50k

Jan 15 / 50 KM / New Market VA
42

Southern Tour Ultra

Jan 20 / 50 Miles / Wilmington NC
40

Coldwater Rumble

Jan 14 / 52 Miles / Goodyear AZ
40

AZT Oracle Rumble

Jan 28 / 50 Miles / Tucson AZ
40

Yankee Springs Winter Challenge

Jan 07 / 50 KM / Middleville MI
39

Retreat Repeat

Jan 07 / 8 Hours / Shulerville SC
38

Bear Bait Ultras

Jan 14 / 50 KM / Milton FL
37

GAC FA50

Jan 07 / 50 KM / Topsfield MA
37

Hellcat 50km Endurance Run

Jan 21 / 50 KM / Green Cove Springs FL
37

Frozen Sasquatch Trail Race

Jan 07 / 50 KM / Charleston WV

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