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SF MARATHON 1ST HALF 2025

Lai Ching Regent Shum

Castro Valley, CA

Bib: 13362 F 34

0:00
0:00
/ mi
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Overall
#0 / 7100
Top 46%
Gender (Female)
#0 / 3107
Top 34%
Division (F30-34)
#0 / 691
Top 35%
Race Day Weather
56°/46°F
light rain

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
10 ft elev
1.81M
9:43/mi
17:35
→ flat
12 ft elev
5.34M
9:50/mi
52:16
↑ 80↓ 74
19 ft elev
6.15M
10:32/mi
1:00:48
↑ 1262.8%
149 ft elev
10.54M
10:02/mi
1:44:52
↑ 230↓ 3610.6%
20 ft elev
11.05M
16:28/mi
1:53:16
↑ 1726.4%
213 ft elev
Finish· 13.11 mi
10:59/mi
2:15:54
↑ 97↓ 1140.2%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6.15M
1:00:489:53 /mi⚡ faster
2nd Half
1:15:0610:47 /mi+23.5%
Positive split — 23.5% 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
1.81M
17:359:431.81 mi17:35
9:43
-
5.34M
52:169:473.53 mi34:41
9:50
+0:07
6.15M
1:00:489:530.81 mi8:32
10:32
+0:42
10.54M
1:44:529:574.39 mi44:04
10:02
-0:30
11.05M
1:53:1610:150.51 mi8:24
16:28
+6:26
Finish(13.11 mi)
2:15:5410:222.06 mi22:38
10:59
-5:29
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

9:43 /mi

Average Pace

10:22 /mi

Slowest Pace

16:28 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:07:30

94% of race

Time at Slower Pace

8:24

6% of race

Average Pace: 10:22 /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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF30-34Seg. OverallSeg. FemalesSeg. F30-34
1.81M1.81 mi1.81 mi3324105423833241054238
5.34M5.34 mi3.53 mi3171+153988+66219+193169997219
6.15M6.15 mi0.81 mi3175-41003-15222-334451120254
10.54M10.54 mi4.39 mi3060+115953+50205+172993931203
11.05M11.05 mi0.51 mi3222-1621021-68226-2148511880427
Finish13.11 mi2.06 mi3288-661066-45239-1338301406313

Segment Performance Analysis

Start → 1.81M

0.0 - 1.8 mi

Top 47%
~flat
+4ft-3ft

Overall

3324

Females

1054

F30-34

239

1.81M→5.34M

1.8 - 5.3 mi

Top 45%
×4story building
+80ft-74ft

Overall

3169

Females

997

F30-34

220

5.34M→6.15M

5.3 - 6.2 mi

Top 49%
×10story building
+126ft-4ft

Overall

3445

Females

1120

F30-34

255

6.15M→10.54M

6.2 - 10.5 mi

Top 42%
×21story building
+230ft-361ft

Overall

2993

Females

931

F30-34

204

10.54M→11.05M

10.5 - 11.1 mi

Top 68%
×14story building
+172ft-0ft

Overall

4851

Females

1880

F30-34

428

11.05M→Finish

11.1 - 13.1 mi

Top 54%
×7story building
+97ft-114ft

Overall

3830

Females

1406

F30-34

313

Passing Analysis

Category:
Athletes Passed
618*
Passed By
582
Net Change
+36
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 1.81M----#3324
1.81M → 5.34M309*156+153#3324#3171
5.34M → 6.15M5458-4#3171#3175
6.15M → 10.54M203*88+115#3175#3060
10.54M → 11.05M6168-162#3060#3222
11.05M → Finish46*112-66#3222#3288
TOTALS618*582+36

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

Passing Charts

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Passing Circle

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Position Flow

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Race Lanes

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The San Francisco Marathon

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