Western States 100

Western States 100 Aid Station Planner

All 13 Western States checkpoints pre-loaded. Enter your goal finish time to get estimated arrival times from Olympic Valley to Auburn.

161km5,600m D+7,000m D-13 checkpointsCutoff: 30h

Full Western States 100 course data: aid stations, cutoffs, course profile

Enter a goal Western States finish time and get estimated arrival times at all 13 checkpoints from Olympic Valley to Auburn - 161 km with 5,600 m of gain and 7,000 m of loss, with crew points like Robinson Flat and Foresthill flagged.

Goal finish time (hh:mm)

Start time

Turns every arrival into a clock time and every cutoff into a margin.

Terrain type

Terrain changes how the goal time is shared between segments, not the total. One surface everywhere cancels out.

Checkpoints (14)

Name

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 10:30

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 10:30

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 12:30

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 14:10

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 17:25

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 19:10

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 21:55

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sat 23:45

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sun 05:00

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sun 07:15

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sun 11:00

Name

Terrain to here

Distance (km)

Cumul. D+ (m)

Cumul. D- (m)

Cutoff Sun 11:00

Crew may meet you at

Robinson Flat 55.0 km, by Sat 14:16
Michigan Bluff 88.0 km, by Sat 19:31
Foresthill 97.0 km, by Sat 20:54
Rucky Chucky 122.0 km, by Sun 00:07
Auburn Lake Trails 130.0 km, by Sun 01:26
Robie Point 158.0 km, by Sun 05:01

Drop bags

Red Star Ridge 27.0 km, by Sat 09:35
Robinson Flat 55.0 km, by Sat 14:16
Michigan Bluff 88.0 km, by Sat 19:31
Foresthill 97.0 km, by Sat 20:54

Estimated arrival, cutoff margin and latest safe departure per checkpoint.
Checkpoint	Dist (km)	D+ (m)	Km-effort	Arrive by	Clock	Cutoff	Buffer	Leave by	Seg time	Seg pace/km
Start	0	0	-	0:00:00	Sat 05:00	-	-	-	-	-
Lyon Ridge	15.0	+900	25.0	2:32:59	Sat 07:32	Sat 10:30	2h57	Sat 07:26Set by Robinson Flat	2:32:59	10:12
Red Star Ridge	27.0	+500	20.0	4:35:21	Sat 09:35	Sat 10:30	55 min	Sat 09:28Set by Robinson Flat	2:02:23	10:12
Duncan Canyon	37.0	+400	17.5	6:22:26	Sat 11:22	Sat 12:30	1h08	Sat 11:15Set by Robinson Flat	1:47:05	10:43
Robinson Flat	55.0	+900	28.5	9:16:50	Sat 14:16	Sat 14:10	-7 min	Sat 14:48Set by Last Chance	2:54:24	9:41
Last Chance	73.0	+300	25.5	11:52:52	Sat 16:52	Sat 17:25	32 min	Sat 17:56Set by Devil's Thumb	2:36:02	8:40
Devil's Thumblikely hiking (pace)	78.0	+700	12.0	13:06:18	Sat 18:06	Sat 19:10	1h04	Sat 20:29Set by Michigan Bluff	1:13:26	14:41
Michigan Bluff	88.0	+0	14.0	14:31:58	Sat 19:31	Sat 21:55	2h23	Sat 22:22Set by Foresthill	1:25:40	8:34
Foresthill	97.0	+400	13.5	15:54:34	Sat 20:54	Sat 23:45	2h50	Sun 01:12Set by Auburn (Finish)	1:22:36	9:11
Rucky Chucky	122.0	+200	31.5	19:07:19	Sun 00:07	Sun 05:00	4h53	Sun 04:25Set by Auburn (Finish)	3:12:45	7:43
Auburn Lake Trails	130.0	+400	13.0	20:26:52	Sun 01:26	Sun 07:15	5h48	Sun 05:44Set by Auburn (Finish)	1:19:33	9:57
No Hands Bridge	143.0	+100	16.5	22:07:50	Sun 03:07	-	-	Sun 07:25Set by Auburn (Finish)	1:40:58	7:46
Robie Point	158.0	+300	18.5	24:01:02	Sun 05:01	Sun 11:00	5h59	Sun 09:19Set by Auburn (Finish)	1:53:12	7:33
Auburn (Finish)likely hiking (pace)	161.0	+500	16.5	25:42:00	Sun 06:42	Sun 11:00	4h18	-	1:40:58	33:39

Lyon Ridge
Sat 07:32
Cutoff Sat 10:302h57
Leave by Sat 07:26Set by Robinson Flat
Dist (km)
15.0
D+ (m)
+900
Seg time
2:32:59
Seg pace/km
10:12
Red Star Ridge
Sat 09:35
Cutoff Sat 10:3055 minTight
Leave by Sat 09:28Set by Robinson Flat
Dist (km)
27.0
D+ (m)
+500
Seg time
2:02:23
Seg pace/km
10:12
Duncan Canyon
Sat 11:22
Cutoff Sat 12:301h08
Leave by Sat 11:15Set by Robinson Flat
Dist (km)
37.0
D+ (m)
+400
Seg time
1:47:05
Seg pace/km
10:43
Robinson Flat
Sat 14:16
Cutoff Sat 14:10-7 minBehind cutoff
Leave by Sat 14:48Set by Last Chance
Dist (km)
55.0
D+ (m)
+900
Seg time
2:54:24
Seg pace/km
9:41
Last Chance
Sat 16:52
Cutoff Sat 17:2532 minTight
Leave by Sat 17:56Set by Devil's Thumb
Dist (km)
73.0
D+ (m)
+300
Seg time
2:36:02
Seg pace/km
8:40
Devil's Thumblikely hiking (pace)
Sat 18:06
Cutoff Sat 19:101h04Tight
Leave by Sat 20:29Set by Michigan Bluff
Dist (km)
78.0
D+ (m)
+700
Seg time
1:13:26
Seg pace/km
14:41
Michigan Bluff
Sat 19:31
Cutoff Sat 21:552h23
Leave by Sat 22:22Set by Foresthill
Dist (km)
88.0
D+ (m)
+0
Seg time
1:25:40
Seg pace/km
8:34
Foresthill
Sat 20:54
Cutoff Sat 23:452h50
Leave by Sun 01:12Set by Auburn (Finish)
Dist (km)
97.0
D+ (m)
+400
Seg time
1:22:36
Seg pace/km
9:11
Rucky Chucky
Sun 00:07
Cutoff Sun 05:004h53
Leave by Sun 04:25Set by Auburn (Finish)
Dist (km)
122.0
D+ (m)
+200
Seg time
3:12:45
Seg pace/km
7:43
Auburn Lake Trails
Sun 01:26
Cutoff Sun 07:155h48
Leave by Sun 05:44Set by Auburn (Finish)
Dist (km)
130.0
D+ (m)
+400
Seg time
1:19:33
Seg pace/km
9:57
No Hands Bridge
Sun 03:07
Leave by Sun 07:25Set by Auburn (Finish)
Dist (km)
143.0
D+ (m)
+100
Seg time
1:40:58
Seg pace/km
7:46
Robie Point
Sun 05:01
Cutoff Sun 11:005h59
Leave by Sun 09:19Set by Auburn (Finish)
Dist (km)
158.0
D+ (m)
+300
Seg time
1:53:12
Seg pace/km
7:33
Auburn (Finish)likely hiking (pace)
Sun 06:42
Cutoff Sun 11:004h18
Dist (km)
161.0
D+ (m)
+500
Seg time
1:40:58
Seg pace/km
33:39

Highlighted rows use a pace heuristic (>12 min/km / >19 min/mi) - likely hiking by speed, not grade. The grade-based power-hike cue is ≥15% (see GAP and Incline tools). Times are distributed proportionally by km-effort.

Leave by is the latest you can start the next segment and still make every cutoff ahead of you at this pace - often set by a station further on, not this one. It does not yet subtract the time you spend stopped, so treat it as the optimistic edge.

Cutoff buffers are estimates from your goal time and published barriers. Courses and barriers change - verify against the official race guide.

Next step

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Western States 100 course in numbers

Climbing per km: 35 m
ITRA km-effort: 217 (100M)
Highest point: 2,667 m
Biggest climb: +751 m over 5.6 km at 13.3% (from Start - Olympic Valley)
Steepest climb: +532 m over 3.5 km at 14.3% (up to Devil's Thumb)
Longest descent: -1,405 m over 24.0 km at 5.4% (through Robinson Flat)
Track climbing above 3%: 30%
Winning time / cutoff: 14h30 / 30h00 (2.1x the winner's time)

Section-by-section climbs, descents and grades are on the Western States 100 course page.

About Western States 100

The Western States 100-Mile Endurance Run covers 161km from Olympic Valley (formerly Squaw Valley) to Auburn, California, with 5,600m of elevation gain and 7,000m of loss. First run in 1974, it is one of the oldest and most prestigious 100-mile races in the world, with a lottery entry system due to extreme demand.

The heat factor. Western States is run in late June in the Sierra Nevada and Central Valley foothills. Canyon sections between Devil's Thumb (78km) and Foresthill (97km) regularly reach 35-40°C. Heat management is the primary cause of DNFs - pace plans that ignore the heat penalty in this section consistently fail. Plan for 20-30% slower actual pace in the canyon relative to your GAP target, and prioritise ice and fluid at every aid station.

Key sections. The opening climb from Olympic Valley to the Escarpment (4km, 700m D+) sets a high effort ceiling immediately. Robinson Flat (55km) is the last major crew point before the canyons. The climb from El Dorado Creek to Michigan Bluff (75-88km) in full afternoon heat is where the race separates finishers from DNFs. Foresthill (97km) is a major psychological milestone - from here the course is more runnable.

Crew access points: Robinson Flat (55km), Michigan Bluff (88km), Foresthill (97km), Rucky Chucky (122km), Auburn Lake Trails (130km), Robie Point (158km). Drop bags allowed at several additional checkpoints - check the current race guide.

Checkpoint data approximate - verify against current official race guide at wser.org before your race.

How the splits are allocated

Your goal time is split across the Western States 100 legs by km-effort: distance + gain/100 + loss/200. Full methodology.

Save your Western States plan and brief your crew in the app

TrailMath uses these models to build periodized plans adjusted to your goals and terrain.

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Checkpoints (14)

Lyon Ridge

Red Star Ridge

Duncan Canyon

Robinson Flat

Last Chance

Devil's Thumblikely hiking (pace)

Michigan Bluff

Foresthill

Rucky Chucky

Auburn Lake Trails

No Hands Bridge

Robie Point

Auburn (Finish)likely hiking (pace)

Western States 100 course in numbers

About Western States 100

How the splits are allocated

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