| 2023-01-07 | 2023 | The Jumping Gorilla Mountain Trail Run |
| 2023-01-14 | 2023 | Pilancones Tunte Trail - 34km |
| 2023-01-14 | 2023 | Pilancones Tunte Trail - 25km |
| 2023-01-21 | 2023 | The Goat Adventure Run |
| 2023-01-28 | 2023 | Jumbo-Holdsworth Trail Race |
| 2023-02-11 | 2023 | Tarawera Ultramarathon 21k |
| 2023-02-18 | 2023 | The Flower Scar Fell Race |
| 2023-02-18 | 2023 | FOURmidable 50k |
| 2023-02-19 | 2023 | Spanish Mountain Running Championship - uphill race |
| 2023-02-19 | 2023 | Mount Ugo Marathon |
| 2023-02-22 | 2023 | Transgrancanaria - KV El Gigante |
| 2023-02-23 | 2023 | Transgrancanaria - Starter |
| 2023-02-24 | 2023 | Transgrancanaria - Marathon |
| 2023-02-26 | 2023 | Spanish National Trail Running Championship |
| 2023-02-26 | 2023 | Mount Kenya Mountain Run |
| 2023-03-11 | 2023 | Six Foot Track Marathon |
| 2023-03-18 | 2023 | Championnat de France de Trail court |
| 2023-03-18 | 2023 | New Zealand Mountain Running Championships |
| 2023-04-01 | 2023 | Buffalo Stampede |
| 2023-04-15 | 2023 | Slovenian Short Trail Championship |
| 2023-04-16 | 2023 | Spanish Mountain Running Championship - up and down race |
| 2023-04-16 | 2023 | Colmen Trail |
| 2023-04-22 | 2023 | Pieniny Ultra-Trail |
| 2023-04-29 | 2023 | Three Peaks Fell Race |
| 2023-04-29 | 2023 | Sunapee Scramble - USA National Mountain Running Championship - Uphill Race |
| 2023-04-29 | 2023 | German Mountain Running Championship |
| 2023-04-30 | 2023 | Sunapee Scramble - USA National Mountain Running Championship - Up and Down Race |
| 2023-05-01 | 2023 | Vertical Fenis |
| 2023-05-05 | 2023 | British Athletics World Championships Selection Race - uphill only |
| 2023-05-06 | 2023 | Breakneck Point Trail Marathon |
| 2023-05-07 | 2023 | Ascension du Col de Vence |
| 2023-05-07 | 2023 | Italian National Mountain Running Championship Up and Down |
| 2023-05-07 | 2023 | British Athletics World Championships Selection Race - up and down race |
| 2023-05-07 | 2023 | Breakneck Point Trail Half Marathon |
| 2023-05-14 | 2023 | Zegama Aizkorri |
| 2023-05-14 | 2023 | Borosa Mountain Race |
| 2023-05-14 | 2023 | Championnat de France de Course de Montagne |
| 2023-05-14 | 2023 | Balkan Mountain Running Championships |
| 2023-05-21 | 2023 | Italian Short Trail Championship |
| 2023-05-21 | 2023 | Gamperney-Berglauf |
| 2023-05-27 | 2023 | Trofeo Valli Bergamasche Leffe |
| 2023-05-27 | 2023 | Montée du Ventoux |
| 2023-05-28 | 2023 | Montée du Grand Ballon |
| 2023-05-28 | 2023 | Maxi Race Annecy |
| 2023-06-03 | 2023 | Ratitovec Mountain Race |
| 2023-06-03 | 2023 | LGT Alpin Marathon |
| 2023-06-03 | 2023 | Resegup |
| 2023-06-07 | 2023 | World Mountain and Trail Running Championship - Classic Uphill |
| 2023-06-08 | 2023 | World Mountain and Trail Running Championship - Short Trail |
| 2023-06-10 | 2023 | GoPro Mountain Games |
| 2023-06-10 | 2023 | World Mountain and Trail Running Championship - Classic Up&Down |
| 2023-06-16 | 2023 | Broken Arrow Vertical |
| 2023-06-17 | 2023 | Mount Washington Road Race |
| 2023-06-17 | 2023 | Slovenian National Mountain Running Championship Up and Down |
| 2023-06-17 | 2023 | Mt Ashland Hillclimb Run |
| 2023-06-18 | 2023 | Broken Arrow Skyrace |
| 2023-06-18 | 2023 | Aletsch Halb Marathon |
| 2023-06-18 | 2023 | Neirivue Moléson |
| 2023-06-25 | 2023 | Mt Evans Ascent |
| 2023-06-25 | 2023 | Tatra Race Run |
| 2023-06-25 | 2023 | Marathon du Mont Blanc |
| 2023-07-01 | 2023 | Gornergrat Zermatt-Marathon |
| 2023-07-01 | 2023 | Cirque Series - Snowbird |
| 2023-07-01 | 2023 | Gornergrat Zermatt - Half Marathon |
| 2023-07-02 | 2023 | Montemuro Vertical Run |
| 2023-07-02 | 2023 | Montreux-Les Rochers-de-Naye |
| 2023-07-02 | 2023 | Quebec Mega Trail - QMT 25km |
| 2023-07-04 | 2023 | Mount Marathon Race |
| 2023-07-09 | 2023 | Grossglockner Mountain Run |
| 2023-07-09 | 2023 | Loon Mountain Race |
| 2023-07-09 | 2023 | Kendall Mountain Run |
| 2023-07-15 | 2023 | Cirque Series - Brighton |
| 2023-07-15 | 2023 | DoloMyths Run |
| 2023-07-15 | 2023 | Snowdon International Race |
| 2023-07-15 | 2023 | PizTri VERTIKAL |
| 2023-07-16 | 2023 | Fletta TRAIL |
| 2023-07-16 | 2023 | Barr Trail Mountain Race |
| 2023-07-22 | 2023 | Montée du Nid d’Aigle |
| 2023-07-22 | 2023 | Stelvio Trail Run |
| 2023-07-22 | 2023 | Tatra Skymarathon |
| 2023-07-23 | 2023 | King of the Mountain |
| 2023-07-28 | 2023 | Fuji Mountain Race |
| 2023-07-29 | 2023 | Cirque Series - Alyeska |
| 2023-07-29 | 2023 | Slovenian National Mountain Running Championship - Uphill Race |
| 2023-07-30 | 2023 | Giir di Mont |
| 2023-08-05 | 2023 | Glacier 3000 Run |
| 2023-08-05 | 2023 | Swain Mountain Race |
| 2023-08-06 | 2023 | Krkonossky Half Marathon |
| 2023-08-06 | 2023 | Thyon-Dixence |
| 2023-08-12 | 2023 | Stranda Fjord Trail Race |
| 2023-08-12 | 2023 | Sierre-Zinal |
| 2023-08-16 | 2023 | The Rut |
| 2023-08-19 | 2023 | Cirque Series - Alta |
| 2023-08-19 | 2023 | Inferno Halbmarathon |
| 2023-08-20 | 2023 | The Squamish 50 |
| 2023-08-20 | 2023 | Scafell Pike Trail Marathon |
| 2023-08-26 | 2023 | Matterhorn Ultraks "Mountain" |
| 2023-08-26 | 2023 | Andes Race |
| 2023-08-27 | 2023 | Challenge Stellina |
| 2023-08-28 | 2023 | Cirque Series - Targhee |
| 2023-09-02 | 2023 | Vertical Nasego |
| 2023-09-02 | 2023 | Ben Nevis Race |
| 2023-09-03 | 2023 | Trofeo Nasego |
| 2023-09-03 | 2023 | Kitzbüheler Horn-Lauf |
| 2023-09-08 | 2023 | Canfranc Canfranc Vertical |
| 2023-09-08 | 2023 | Harder Run |
| 2023-09-09 | 2023 | Cirque Series - A' Basin |
| 2023-09-09 | 2023 | Schlickeralmlauf |
| 2023-09-09 | 2023 | Dolomitenmann |
| 2023-09-09 | 2023 | Südtirol Drei Zinnen Alpine Run |
| 2023-09-09 | 2023 | Jungfrau-Marathon |
| 2023-09-10 | 2023 | Canfranc Canfranc Classic |
| 2023-09-15 | 2023 | Lone Peak VK |
| 2023-09-16 | 2023 | Pikes Peak Ascent |
| 2023-09-16 | 2023 | NACAC Mountain Running Championships |
| 2023-09-16 | 2023 | NACAC Trail Running Championships |
| 2023-09-16 | 2023 | UTMP Maratòn Montana Palentina |
| 2023-09-17 | 2023 | Pikes Peak Marathon |
| 2023-09-17 | 2023 | Italian National Mountain Running Championship - only up |
| 2023-09-23 | 2023 | Seven Sisters Skyline |
| 2023-09-23 | 2023 | Skyrhune |
| 2023-09-23 | 2023 | Birkie Trail Run Festival - Half Marathon |
| 2023-09-23 | 2023 | Hochfelln-Berglauf |
| 2023-09-23 | 2023 | Mammoth Trail Fest |
| 2023-09-23 | 2023 | Cirque Series - Engelberg |
| 2023-09-24 | 2023 | Waterville Valley Mountain Race |
| 2023-09-29 | 2023 | StolzeKleiven Opp |
| 2023-09-30 | 2023 | Primiero Dolomiti Trail |
| 2023-09-30 | 2023 | Fujisanroku Trail Run |
| 2023-10-06 | 2023 | Šmarna Gora Record |
| 2023-10-07 | 2023 | Šmarna Gora Race |
| 2023-10-07 | 2023 | Tour de Tirol Kaisermarathon Soll |
| 2023-10-07 | 2023 | KV Chiavenna Lagunc |
| 2023-10-07 | 2023 | Flagstaff Sky Peaks |
| 2023-10-08 | 2023 | Olla de Nuria |
| 2023-10-08 | 2023 | Val Bregaglia Trail |
| 2023-10-13 | 2023 | Beyond the Coast Sky Gran Canaria - Uphill |
| 2023-10-14 | 2023 | Cranmore Mountain Race |
| 2023-10-14 | 2023 | Beyond the Coast Sky Gran Canaria - Long Distance |
| 2023-10-15 | 2023 | Beyond the Coast Sky Gran Canaria – Classic |
| 2023-10-21 | 2023 | Golden Trail World Series Final - Men's race |
| 2023-10-22 | 2023 | Trofeo Vanoni - men's race |
| 2023-10-22 | 2023 | Trofeo Vanoni - women's race |
| 2023-10-22 | 2023 | Golden Trail World Series Final - Women's race |
| 2023-11-03 | 2023 | K15 ARGENTINA |
| 2023-11-04 | 2023 | K42 ARGENTINA |
| 2023-11-04 | 2023 | Moab Trail Marathon |
| 2023-11-04 | 2023 | Moab Trail Half Marathon |
| 2023-11-19 | 2023 | Point to Pinnacle |
| 2023-12-02 | 2023 | Luxmore Grunt |
