S trails 2027: 45 to 74 km-effort

163 races in 2027 are 45 to 74 km-effort. Each with its date, country, elevation gain/km, cut-off time and minimum speed required.

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Widest cut-off times in S

The widest cut-off requires a minimum speed of 1.6 km/h: Scenic 500 K30.

Scenic 500 K30 : 1.6 km/h (32 km in 20 h)
Trails De La Vallée Du Brevon - AlloDuoTrail - relais 1 : 2.2 km/h (32 km in 15 h)
Flagstaff Crest 39 : 2.3 km/h (63 km in 27 h)
Ultra Trail des Vallees - Le Tour Des Vallées 42km : 2.6 km/h (42 km in 16 h 09)
Madrisa Trail Klosters by LOWA - T33 : 2.8 km/h (33 km in 11 h 50)

Most rolling races in S

The most rolling climbs only 7 m per km: This ain't your mother's 50k.

This ain't your mother's 50k : 7 m/km (362 m elevation gain over 49 km)
Ultra Trail des Vallees - Le Tour Des Vallées 42km : 10 m/km (439 m elevation gain over 42 km)
Dam Yeti 55K : 11 m/km (582 m elevation gain over 55 km)
Flagstaff Crest 39 : 11 m/km (685 m elevation gain over 63 km)
Suislaw dunes : 14 m/km (703 m elevation gain over 49 km)

Steepest races in S

The steepest climbs 119 m per km: Skyrace Lodrino - Lavertezzo.

Skyrace Lodrino - Lavertezzo : 119 m/km (2,706 m elevation gain over 23 km)
Scenic 500 K30 : 89 m/km (2,885 m elevation gain over 32 km)
Malcesine Baldo Trail - 26k Medium : 83 m/km (2,309 m elevation gain over 28 km)
Farol Adventure Trail - Flores Azores - Farol Adventure Trail 36Km : 81 m/km (2,938 m elevation gain over 36 km)
Trails De La Vallée Du Brevon - Trail des Crêtes du Brevon : 81 m/km (2,765 m elevation gain over 34 km)

Your estimated time on each race

Calculated at your UTMB Index, by the same formula as your RAVIT plan.

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The 163 S 2027 races (45 to 74 km-effort).
No.	Race	Date	Country	Cat.	Effort-km	Elev. gain/km (m/km)	Time limit	Minimum speed (km/h)	Aid stations
1	This ain't your mother's 50k	01/31	US	S	52	7	unknown	unknown	9
2	Ultra Trail des Vallees - Le Tour Des Vallées 42km	03/20	FR	S	46	10	16 h 09	2.6	unknown
3	Dam Yeti 55K	06/05	US	S	60	11	unknown	unknown	6
4	Flagstaff Crest 39	05/07	US	S	69	11	27 h	2.3	5
5	Suislaw dunes	03/13	US	S	55	14	unknown	unknown	6
6	Ecotrail Paris 45km	03/20	FR	S	53	15	unknown	unknown	2
7	TRAIL des 3 Chapelles - Trail 43km	03/20	FR	S	48	15	6 h	7.1	unknown
8	Troublesome Hollow 50k	04/24	US	S	60	17	9 h 45	5.3	5
9	Ultra Tour des Côtes d'Armor - 55km	02/28	FR	S	64	18	9 h	6.1	unknown
10	Desert RATS Trail Running Festival - 50K	04/10	US	S	58	19	10 h	4.9	6
11	Antelope Canyon 50k	03/06	US	S	65	20	13 h	4.2	4
12	Way Too Cool	03/06	US	S	60	20	8 h 30	5.9	5
13	Hunsbuckel-Trail - LongTrail	08/15	unknown	S	56	21	9 h	5.2	unknown
14	Gauja Trail by UTMB - Gauja Trail 50 K	08/08	LV	S	63	21	11 h	4.8	3
15	Salmon Falls 50k	02/20	US	S	60	21	9 h	5.6	7
16	Tarawera Ultra-Trail - T50	02/13	NZ	S	64	23	14 h	3.7	5
17	Warbird 50K	03/20	US	S	64	24	10 h	5.2	unknown
18	Cool Moon 25	06/12	US	S	50	24	unknown	unknown	8
19	Istria 100 - 42K	04/03	HR	S	52	24	8 h	5.3	4
20	LA BARJO - La Demi Barjo	06/20	FR	S	63	26	8 h 20	6.0	unknown
21	Volvic Volcanic Experience - VVX Experience Chaine des Puys - Faille de Limagne Relais 2	05/07	FR	S	54	27	10 h	4.3	unknown
22	Arc of Attrition - Arc 50K	01/24	GB	S	62	27	9 h	5.5	4
23	Trail des Plus Beaux Villages de France du 47 - Le Marathon des PBVF en solo	05/30	FR	S	57	27	5 h	9.1	unknown
24	TUSCANY CROSSING - 53 KM	04/07	IT	S	66	28	12 h	4.4	unknown
25	Grindstone Trail Running Festival - 50K	09/25	US	S	67	29	9 h	5.8	5
26	Rothrock - 50K	05/15	US	S	68	29	12 h	4.4	9
27	Xtrail - Xtrail 50K	03/06	TW	S	65	29	13 h	3.9	6
28	trail Margeride	09/12	FR	S	55	29	7 h	6.1	unknown
29	Trail Alsace - Trail des Celtes	05/16	FR	S	63	31	9 h	5.4	3
30	Pacifico 50k	05/29	US	S	66	31	unknown	unknown	13
31	Torrencial Chile - LLANCAHUE 45K	06/27	CL	S	59	31	9 h	5.0	5
32	TDLS - Ultra Trail de la Sibérie - BE - 57K	02/20	BE	S	68	31	unknown	unknown	unknown
33	Ultra Trail Tour de Nancy - UTTN Mirabelle	05/23	FR	S	49	32	6 h 30	5.8	unknown
34	FOURmidable 35k	02/13	US	S	46	32	unknown	unknown	5
35	Eagleton Trail Challenge 50k	04/03	US	S	63	32	unknown	unknown	unknown
36	Paraty Brazil - PTR 34	09/25	BR	S	45	32	9 h	3.9	5
37	The Canyons Endurance Runs - 50K	04/24	US	S	66	32	10 h	5.0	6
38	FOURmidable 50k	02/13	US	S	66	32	unknown	unknown	6
39	Volvic Volcanic Experience - Trail Experience Impluvium	05/07	FR	S	61	33	10 h	4.6	3
40	Trail de Haute Provence - THP40	05/08	FR	S	51	34	10 h	3.9	3
41	Signal Peak 24M	07/03	US	S	51	34	9 h 30	4.1	5
42	Worlds End Ultra 50k	06/05	US	S	65	34	12 h	4.1	6
43	Sharish Monsaraz Natur Trail - SMNT 50K	03/06	PT	S	69	35	9 h	5.7	unknown
44	Girona - 50K	04/03	ES	S	74	35	14 h	3.9	unknown
45	Chianti Ultra Trail - Chianti Marathon Trail	03/19	IT	S	63	35	9 h	5.2	4
46	La Romagnatoise - Trail du Golloix	01/31	FR	S	69	35	7 h	7.4	3
47	Volvic Volcanic Experience - Experience Terra Volcana - 83km duo Relai 1	05/07	FR	S	57	35	8 h	5.3	unknown
48	FOREZTRAILS - L'AUGEROLLOISE	03/07	FR	S	45	35	5 h 45	5.9	unknown
49	100 MILLAS SIERRAS DEL BANDOLERO by Trangoworld - CMSB - Maraton Bandolera	03/06	ES	S	52	36	7 h	5.6	unknown
50	TDLS - Ultra Trail de la Sibérie - BE - 42km	02/20	BE	S	58	36	9 h	4.8	unknown
51	Trail de Haute Provence - THP50	05/08	FR	S	67	36	12 h	4.1	4
52	S1 Trail - La Corsa Della Bora - S1 TransKarst Ultra	01/10	IT	S	74	36	12 h	4.6	5
53	trail du revermont - la grande madone	02/28	FR	S	47	37	4 h 15	8.1	unknown
54	Ecomaratona Clivus - 50km	01/16	IT	S	67	37	9 h	5.5	unknown
55	Trail hivernal des Coursières - 33km	01/10	FR	S	46	37	4 h 45	7.1	unknown
56	Malaysia Ultra-Trail - MALAYSIA50	09/04	unknown	S	74	37	16 h	3.4	7
57	Ultra-Trail des Coursières - Le 50 km des Coursières	05/08	FR	S	71	37	13 h 30	3.8	unknown
58	Transgrancanaria - Marathon	02/26	ES	S	64	38	11 h 20	4.1	3
59	Trail du Saint Jacques - 50K - Monistrail	06/20	FR	S	74	38	11 h 30	4.7	6
60	SWISS CANYON TRAIL - 51 KM	06/05	CH	S	73	38	13 h	4.1	5
61	Mt.FUJI100 - ASUMI40k	04/24	JP	S	53	38	9 h 30	4.1	1
62	FOREZTRAILS - La FOC	03/07	FR	S	70	39	8 h	6.3	unknown
63	TDLS - Ultra Trail de la Sibérie - BE - 35K	02/20	BE	S	49	39	unknown	unknown	unknown
64	Crazy Runners Frankenwald Trail - UltraTrail	07/24	unknown	S	73	39	10 h	5.3	unknown
65	SWISS CANYON TRAIL - 31 KM	06/05	CH	S	46	39	10 h	3.3	3
66	BraunenBerg-Trail - Rolladen-Kaiser-Trail	09/18	unknown	S	46	39	5 h	6.6	unknown
67	TRAIL NATURA SIOULE - 53 KM	04/25	FR	S	74	40	10 h	5.3	5
68	Aare Trail 50k	06/13	CH	S	72	40	10 h 30	4.9	5
69	Signal Peak 50K	07/03	US	S	69	40	10 h	5.0	6
70	La Romagnatoise - Ronde des plateaux	01/31	FR	S	61	40	5 h 45	7.7	3
71	Gorge Waterfalls 50k	04/16	US	S	71	40	unknown	unknown	5
72	Trail du Cirque du Fer à Cheval - 46 km	03/20	FR	S	65	41	10 h	4.7	5
73	Grizzly Peak Trail Run	05/08	US	S	71	41	9 h	5.7	13
74	TRAIL DU SALEVE - LA CROISETTE	06/27	FR	S	53	41	6 h	6.4	unknown
75	2. WILDMAN Harz - WILDMAN Classic	09/04	unknown	S	49	42	7 h	5.0	unknown
76	Ultratrail Fränkische Schweiz (UTFS) - Speedtrail (33 km)	04/24	unknown	S	48	42	unknown	unknown	2
77	Davos X-Trails - Gold Run 43km	07/24	CH	S	61	42	11 h 30	3.7	unknown
78	UTDF - Marathon du Malbec	02/07	FR	S	63	42	8 h	5.6	unknown
79	LE GRAND TRAIL DE L'OUEST - GTO 50	07/03	FR	S	69	43	15 h	3.2	unknown
80	Rureifel Trail - RET44	04/17	unknown	S	67	43	10 h 20	4.6	unknown
81	Trail du Cirque du Fer à Cheval - 32 km	03/20	FR	S	47	43	8 h	4.2	4
82	UP THE HILL - UTH50	04/24	unknown	S	72	43	10 h	5.1	unknown
83	Sonoma Coast Trail Marathon	05/29	US	S	60	43	unknown	unknown	4
84	Les Courses du Mont-Terrible - Trail de Pietchiesson	04/18	CH	S	52	44	6 h 30	5.6	3
85	TRAIL DES ANGES - MARATRAIL DE L'ARGENTIERE	03/21	FR	S	66	44	9 h	5.1	unknown
86	Rock N The Knob	09/11	US	S	71	45	10 h	4.9	7
87	Sonoma Coast 50K	05/29	US	S	72	45	unknown	unknown	5
88	Winter Brich Trail - 42K	02/14	IT	S	63	46	8 h 15	5.3	unknown
89	Hong Kong 100 - The Third	01/21	HK	S	49	46	10 h	3.4	1
90	mozart 100 - mozart Marathon	06/05	AT	S	65	47	14 h	3.2	4
91	Yuba Gold 50K	10/03	US	S	73	47	unknown	unknown	4
92	MALAGON TRAIL BISABOR ENERGY - CUMBRE	01/17	ES	S	65	47	8 h	5.5	unknown
93	XIII TRILHOS DOS REIS - Delta Cafés - Ultra Trilhos dos Reis	01/17	PT	S	68	47	10 h	4.7	unknown
94	Yuba Gold 35K	10/03	US	S	51	47	unknown	unknown	3
95	MaXi-Race - Marathon eXpérience	05/30	FR	S	59	47	8 h 45	4.6	3
96	Trail Drôme en Baronnies - Sur les traces des Barons	04/11	FR	S	56	47	7 h 30	5.1	4
97	Zugspitz Ultra Trail - Mittenwald Trail	06/19	unknown	S	64	47	10 h	4.4	5
98	Pieniny by UTMB - Żwawe Wierchy	04/23	PL	S	49	48	8 h	4.2	2
99	Pieniny by UTMB - Wielka Prehyba	04/24	PL	S	65	48	9 h	4.9	3
100	Ciucas X3 - The Ridge	09/04	RO	S	57	49	unknown	unknown	4
101	Trails de la Truyère - Les Barrages	05/01	FR	S	69	49	8 h	5.8	3
102	Trails de la Truyère - Les Barrages - Relais	05/01	FR	S	69	49	8 h	5.8	unknown
103	Tredozio Trail - Tredozio 30K	04/11	IT	S	45	50	8 h	3.8	unknown
104	Trail des Chamois - Le Chamois	03/14	FR	S	48	50	7 h 49	4.1	3
105	Puerto Vallarta - Haramara 37K	03/06	MX	S	56	51	9 h	4.1	5
106	Trail des Chamois - Mara Chamois	03/14	FR	S	62	51	10 h	4.2	4
107	Val Maremola Trail ed.15 - Val Maremola Long Trail ed.15	02/07	IT	S	52	51	6 h 59	5.0	unknown
108	Trail de La Grande Montagne - Le Marathon du Sanglier	05/16	FR	S	64	52	8 h	5.3	unknown
109	Trail de La Grande Montagne - Le Marathon du Sanglier RELAIS	05/16	FR	S	64	52	8 h	5.3	unknown
110	Transju'Trail - Le Trail 42km	06/06	FR	S	64	53	10 h	4.2	4
111	Vouga Trail - Sever do Vouga - Vouga Trail Longo	01/09	PT	S	56	53	7 h	5.3	unknown
112	TRAIL DELLE 2 AQUILE - T2A Trail Medio	04/24	IT	S	53	53	6 h	5.8	unknown
113	Tenerife Bluetrail - TENERIFE BLUETRAIL 47k RELAY	04/10	ES	S	71	53	11 h 30	4.1	6
114	Mountain Ultra Trail - MUT Marathon by UTMB	05/29	ZA	S	66	53	12 h	3.6	3
115	Les Courses du Mont-Terrible - Relais 70K - Relais 2	04/17	CH	S	55	53	7 h	5.2	3
116	Les Courses du Mont-Terrible - Relais 70K - Relais 1	04/17	CH	S	54	55	7 h	5.0	2
117	Trail della Gallinara - Gallinara 30K	01/17	IT	S	46	55	6 h	5.0	unknown
118	13a Magnifica Salodium - Magnifica Salodium Long Trail	02/21	IT	S	48	55	6 h	5.2	unknown
119	TRAIL DU GRESIVAUDAN - 30KMS	02/20	FR	S	47	56	6 h	5.1	unknown
120	Tenerife Bluetrail - TENERIFE BLUETRAIL 47k	04/10	ES	S	72	56	11 h 30	4.1	6
121	FENERA TRAIL - PERCORSO ORANGE	05/15	IT	S	52	57	7 h 30	4.5	unknown
122	Ultra Trail do Marão - TM	04/03	PT	S	63	57	10 h	4.0	unknown
123	Trail Thoiry-Reculet	05/23	FR	S	51	58	7 h 15	4.5	unknown
124	TRAIL QUILLAN - Le tignous	04/24	FR	S	45	59	6 h 30	4.4	unknown
125	Wildstrubel - Wild Glacier Marathon Lenk	09/10	CH	S	63	60	10 h 30	3.8	4
126	Trail Verbier St Bernard - Verbier X-Plore	07/11	CH	S	45	60	7 h	4.0	3
127	Arosa Trailrun - AT33	09/11	CH	S	52	61	7 h	4.7	unknown
128	Swissalpine - K42	07/16	CH	S	68	61	12 h 30	3.4	unknown
129	MOUNTAINMAN Nesselwang - L-Trail	08/29	unknown	S	53	61	10 h	3.3	unknown
130	Skyrace del Voltigno - Skymarathon del Voltigno	05/02	IT	S	55	62	10 h	3.4	unknown
131	Bucovina Ultra Rocks by UTMB - ROCKY	07/24	RO	S	55	62	8 h 45	3.9	6
132	Stoos-Trail - ST46	07/10	CH	S	74	62	9 h	5.1	unknown
133	GRAN RAID DELLE PREALPI TREVIGIANE - GRAN RAID GR40	05/15	IT	S	64	63	10 h	4.0	unknown
134	MOUNTAINMAN Nesselwang - XL-Trail	08/29	unknown	S	70	63	10 h	4.3	unknown
135	Trails De La Vallée Du Brevon - AlloDuoTrail - relais 1	05/16	FR	S	52	63	15 h	2.2	1
136	9º Trail do Texugo - Ultra Trail - 45k	04/04	PT	S	74	63	9 h	5.1	unknown
137	9º Trail do Texugo - Trail Longo - 30K	04/04	PT	S	49	64	7 h 30	4.0	unknown
138	Val D'Aran - EXP - Experiència d'Aran	07/11	ES	S	54	64	7 h 15	4.6	4
139	Marbella Epic Trail - Destroyer	02/20	ES	S	69	65	10 h	4.2	unknown
140	Klewenalp-Trail - T43	08/08	CH	S	71	66	10 h 15	4.2	unknown
141	Eiger Ultra Trail - E35 - North Face Trail	07/17	CH	S	60	66	9 h	4.1	4
142	Marbella Epic Trail - Tragapiedras	02/20	ES	S	59	67	9 h	4.0	unknown
143	Speedgoat Mountain Races - 30K	07/23	US	S	52	67	10 h	3.2	5
144	Madrisa Trail Klosters by LOWA - T33	08/14	CH	S	55	67	11 h 50	2.8	unknown
145	Sobrepuny Trail 37km	04/04	ES	S	59	67	7 h	5.1	unknown
146	TRAIL QUILLAN - le tremplin	04/25	FR	S	71	67	9 h 40	4.4	unknown
147	44a VOLTA AL TERME DE FONDEGUILLA - VOREJANT EL TERME	05/29	ES	S	57	68	8 h	4.3	unknown
148	La Comblorane - XL - 43 km	06/13	FR	S	72	69	8 h	5.4	unknown
149	Trail des 4 cantons - T30	04/25	FR	S	51	69	7 h 30	4.1	unknown
150	Monte Rosa Walserwaeg - Walserwaeg Trail	07/17	IT	S	71	69	12 h	3.5	6
151	Trail Verbier St Bernard - Verbier Marathon X-Treme	07/09	CH	S	73	71	13 h 30	3.2	5
152	Scenic Trail - K31 Skyrace	06/12	CH	S	54	72	7 h 30	4.2	unknown
153	Malcesine Baldo Trail - 41K Marathon	04/24	IT	S	73	75	10 h	4.2	unknown
154	Povoação Trail - 30 KMS	03/14	PT	S	56	76	7 h	4.6	unknown
155	Restonica Trail - Tavignanu Trail	07/10	FR	S	59	77	9 h 30	3.5	3
156	Montreux Trail Festival - MXSKY	07/25	CH	S	53	77	8 h	3.8	3
157	Morobbia Trail - Trail del Lupo K33 2500m D+	05/15	CH	S	59	77	8 h	4.2	unknown
158	Trail du Fort de Tamié - Les 2 Savoies	05/16	FR	S	50	79	5 h 30	5.1	unknown
159	Trails De La Vallée Du Brevon - Trail des Crêtes du Brevon	05/16	FR	S	61	81	11 h	3.1	4
160	Farol Adventure Trail - Flores Azores - Farol Adventure Trail 36Km	04/17	PT	S	65	81	8 h	4.6	4
161	Malcesine Baldo Trail - 26k Medium	04/24	IT	S	50	83	7 h	4.0	unknown
162	Scenic 500 K30	08/07	CH	S	61	89	20 h	1.6	1
163	Skyrace Lodrino - Lavertezzo	06/06	CH	S	49	119	8 h	2.8	unknown

Effort-km = km + elev. gain/100 · categories XXS to XXL by effort-km · minimum speed = distance ÷ time limit.

Distances as the crow flies from the start, rounded to the nearest ten. Cities: GeoNames (CC BY 4.0).

Ranking glossary

Effort-km: Distance in km plus elevation gain divided by 100: 50 km and 2,500 m of gain equals 75 effort-km. Categories: XXS under 25, XS 25 to 44, S 45 to 74, M 75 to 114, L 115 to 154, XL 155 to 209, XXL 210 and above.
Gain/km: Elevation gain divided by distance, in meters per kilometer: the lower it is, the more runnable the race.
Time limit: The maximum time allowed by the organizer to reach the finish, the final cut-off time.
Minimum speed: Distance divided by time limit, in km/h: the average pace to maintain to finish within the deadline. The lower it is, the wider the cut-off.

FAQ

How many S races in 2027?

163 2027 races from the RAVIT catalog are 45 to 74 km-effort, out of 740 ranked 2027 races.

Which S 2027 race has the widest cut-off time?

Scenic 500 K30: 32 km in 20 h, i.e. a minimum speed of 1.6 km/h.

What pace do you need to maintain on a S race?

The median minimum speed is 4.6 km/h, across 145 races with a published time limit.

How much elevation gain per km on a S race?

43 m/km median, from 7 m/km (This ain't your mother's 50k) to 119 m/km (Skyrace Lodrino - Lavertezzo).

How many S races publish a time limit?

145 out of 163. The others show « unknown » and fall to the end of the minimum speed ranking.

Why rank by effort-km rather than distance?

Because 100 m of elevation gain costs roughly the effort of one flat kilometer: 50 km and 2,500 m gain make 75 effort-km, like 75 flat km.

Method and sources

Data updated October 31, 2026, covering 163 2027 races in the RAVIT catalog.

Distance, gain, date, country and time limit: sourced from each race organizer's website, and utmb.world for UTMB World Series events; each entry cites its source.
Categories XXS to XXL: calculated by RAVIT using effort-km (km + gain/100), at the thresholds shown above.
Minimum speed: distance divided by time limit. A race with no published time limit displays « unknown » and sorts to the end.
Aid stations: the number of documented aid stations on the race's RAVIT entry; « unknown » when none are yet documented.