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SF MARATHON 1ST HALF 2026

Thalia Acosta

SF, CA

Bib: 18605 F 24

0:00
0:00
/ mi
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Overall
#0 / 6575
Gender (Female)
#0 / 2930
Top 48%
F20-29
#0 / 353
Race Day Weather
59°/49°F
scattered clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
2M
11:23/mi
22:46
→ flat
4M
12:24/mi
47:34
↑ 67↓ 69
6M
11:04/mi
1:09:43
↑ 123
8M
12:04/mi
1:33:51
↑ 166↓ 53
9.6M
8:09/mi
1:46:54
↑ 68↓ 193
10M
20:34/mi
1:55:07
↓ 24
10.5M
5:12/mi
1:57:43
↓ 73
12M
14:39/mi
2:19:41
↑ 280
Finish· 13.11 mi
10:16/mi
2:31:04
↑ 14↓ 89
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6M
1:09:4311:37 /mi⚡ faster
2nd Half
1:21:2111:27 /mi+16.7%
Positive split — 16.7% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
2M
22:4611:232.00 mi22:46
11:23
-
4M
47:3411:542.00 mi24:48
12:24
+1:01
6M
1:09:4311:372.00 mi22:09
11:04
-1:20
8M
1:33:5111:442.00 mi24:08
12:04
+1:00
9.6M
1:46:5411:081.60 mi13:03
8:09
-3:55
10M
1:55:0711:310.40 mi8:13
20:34
+12:25
10.5M
1:57:4311:130.50 mi2:36
5:12
-15:22
12M
2:19:4111:381.50 mi21:58
14:39
+9:27
Finish(13.11 mi)
2:31:0411:311.11 mi11:23
10:16
-4:23
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

5:12 /mi

Average Pace

11:31 /mi

Slowest Pace

20:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

15:39

10% of race

Time at Steady Pace

1:45:14

70% of race

Time at Slower Pace

30:11

20% of race

Average Pace: 11:31 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi3.3mi6.6mi9.8mi13.1mi
Pace:
Faster
Steady
Slower
Featured Segment

Garmin Challenge

Top 56%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

10:49

Segment Time

12:01/mi

Pace

0.90 mi

Distance

Overall

3680

Women

1313

Division

176

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF20-29Seg. OverallSeg. FemalesSeg. F20-29
2M2.00 mi5280211027732611145156
4M2.00 mi5571-2912286-176302-2557682416315
6M2.00 mi5080+4911984+302264+3839781405190
8M2.00 mi4925+1551887+97253+1146311704216
9.6M1.60 mi4348+5771592+295208+45169756077
10M0.40 mi4268+801562+30206+237871381187
10.5M0.50 mi4247+211549+13205+136861292174
12M1.50 mi4029+2181454+95193+1232611145156
Finish(13.11 mi)1.11 mi3939+901412+42192+132081113150

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 50%
~flat
+5ft-3ft

Overall

3261

Females

1145

F20-24

156

2M→4M

2.0 - 4.0 mi

Top 88%
×4story building
+67ft-69ft

Overall

5768

Females

2416

F20-24

316

4M→6M

4.0 - 6.0 mi

Top 61%
×9story building
+123ft-9ft

Overall

3978

Females

1405

F20-24

191

6M→8M

6.0 - 8.0 mi

Top 70%
×12story building
+166ft-53ft

Overall

4631

Females

1704

F20-24

216

8M→9.6M

8.0 - 9.6 mi

Top 26%
×13story building
+68ft-193ft

Overall

1697

Females

560

F20-24

77

9.6M→10M

9.6 - 10.0 mi

Top 58%
×2story building
+0ft-24ft

Overall

3787

Females

1381

F20-24

187

10M→10.5M

10.0 - 10.5 mi

Top 56%
×6story building
+1ft-73ft

Overall

3686

Females

1292

F20-24

174

10.5M→12M

10.5 - 12.0 mi

Top 50%
×21story building
+280ft-26ft

Overall

3261

Females

1145

F20-24

156

12M→Finish

12.0 - 13.1 mi

Top 49%
×7story building
+14ft-89ft

Overall

3208

Females

1113

F20-24

150

Passing Analysis

Category:
▲Net Change
+0
0 passed by0* passed
SegmentMovementRank
Start → 2M-#5280
2M → 4M
33948-291
#5280 → #5571
4M → 6M
5496*+491
#5571 → #5080
6M → 8M
77232*+155
#5080 → #4925
8M → 9.6M
1578+577
#4925 → #4348
9.6M → 10M
1898+80
#4348 → #4268
10M → 10.5M
526+21
#4268 → #4247
10.5M → 12M
28246*+218
#4247 → #4029
12M → Finish
16106*+90
#4029 → #3939
TOTALS
4891830*+1341
#5280 → #3939

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Visualized

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon

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Race Place Events