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SF MARATHON 1ST HALF 2026

Samantha Castro

Piedmont, CA

Bib: 18951 F 24

0:00
0:00
/ mi
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Overall
#0 / 6575
Gender (Female)
#0 / 2930
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
10 ft elev
2M
10:55/mi
21:51
→ flat
12 ft elev
4M
11:34/mi
44:58
↑ 67↓ 69
10 ft elev
6M
11:35/mi
1:08:08
↑ 1231.1%
126 ft elev
8M
12:19/mi
1:32:46
↑ 166↓ 531.1%
246 ft elev
9.6M
12:19/mi
1:52:28
↑ 68↓ 1931.5%
126 ft elev
10M
28:04/mi
2:03:41
↓ 241.1%
90 ft elev
10.5M
5:36/mi
2:06:29
↓ 732.7%
18 ft elev
12M
17:17/mi
2:32:24
↑ 2803.2%
272 ft elev
Finish· 13.11 mi
11:41/mi
2:45:22
↑ 14↓ 891.3%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6M
1:08:0811:21 /mi⚡ faster
2nd Half
1:37:1413:41 /mi+42.7%
Positive split — 42.7% slower in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
2M
21:5110:552.00 mi21:51
10:55
-
4M
44:5811:152.00 mi23:07
11:34
+0:39
6M
1:08:0811:212.00 mi23:10
11:35
+0:01
8M
1:32:4611:362.00 mi24:38
12:19
+0:44
9.6M
1:52:2811:431.60 mi19:42
12:19
0:00
10M
2:03:4112:220.40 mi11:13
28:04
+15:45
10.5M
2:06:2912:030.50 mi2:48
5:36
-22:28
12M
2:32:2412:421.50 mi25:55
17:17
+11:41
Finish(13.11 mi)
2:45:2212:371.11 mi12:58
11:41
-5:36
Trend:
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoints & Pacing

Pace Line

Fastest Pace

5:36 /mi

Average Pace

12:37 /mi

Slowest Pace

28:04 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:48

2% of race

Time at Steady Pace

2:05:26

76% of race

Time at Slower Pace

37:08

22% of race

Average Pace: 12:37 /mi

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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 90%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

14:01

Segment Time

15:35/mi

Pace

0.90 mi

Distance

Overall

5950

Women

2581

Division

330

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF20-29Seg. OverallSeg. FemalesSeg. F20-29
2M2.00 mi4591170822450192070271
4M2.00 mi4801-2101828-120236-1249361922251
6M2.00 mi4706+951769+59235+146101722233
8M2.00 mi4761-551786-17237-248761842235
9.6M1.60 mi5129-3682010-224263-2660052595321
10M0.40 mi5306-1772115-105279-1661812723340
10.5M0.50 mi5292+142107+8277+246711815239
12M1.50 mi5264+282110-3280-350192070271
Finish(13.11 mi)1.11 mi5161+1032059+51277+346831889246

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 76%
~flat
+5ft-3ft

Overall

5019

Females

2070

F20-24

271

2M→4M

2.0 - 4.0 mi

Top 75%
×4story building
+67ft-69ft

Overall

4936

Females

1922

F20-24

252

4M→6M

4.0 - 6.0 mi

Top 70%
×9story building
+123ft-9ft

Overall

4610

Females

1722

F20-24

234

6M→8M

6.0 - 8.0 mi

Top 74%
×12story building
+166ft-53ft

Overall

4876

Females

1842

F20-24

235

8M→9.6M

8.0 - 9.6 mi

Top 91%
×13story building
+68ft-193ft

Overall

6005

Females

2595

F20-24

321

9.6M→10M

9.6 - 10.0 mi

Top 94%
×2story building
+0ft-24ft

Overall

6181

Females

2723

F20-24

340

10M→10.5M

10.0 - 10.5 mi

Top 71%
×6story building
+1ft-73ft

Overall

4671

Females

1815

F20-24

239

10.5M→12M

10.5 - 12.0 mi

Top 76%
×21story building
+280ft-26ft

Overall

5019

Females

2070

F20-24

271

12M→Finish

12.0 - 13.1 mi

Top 71%
×7story building
+14ft-89ft

Overall

4683

Females

1889

F20-24

246

Passing Analysis

Category:
▼Net Change
0
0 passed by0* passed
SegmentMovementRank
Start → 2M-#4591
2M → 4M
318108-210
#4591 → #4801
4M → 6M
86181*+95
#4801 → #4706
6M → 8M
183128*-55
#4706 → #4761
8M → 9.6M
3768-368
#4761 → #5129
9.6M → 10M
1847-177
#5129 → #5306
10M → 10.5M
216+14
#5306 → #5292
10.5M → 12M
87115*+28
#5292 → #5264
12M → Finish
7110*+103
#5264 → #5161
TOTALS
1243673*-570
#4591 → #5161

* 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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