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SF MARATHON 1ST HALF 2025

Alisa Lai

Castro Valley, CA

Bib: 12383 F 41

0:00
0:00
/ mi
Masters
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Overall
#0 / 7100
Gender (Female)
#0 / 3107
Masters (Masters Women)
#0 / 776
Division (F40-44)
#0 / 244
Race Day Weather
56°/46°F
light rain

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
1.81M
10:10/mi
18:25
→ flat
5.34M
11:50/mi
1:00:13
↑ 80↓ 74
6.15M
14:18/mi
1:11:48
↑ 126
10.54M
14:33/mi
2:15:41
↑ 230↓ 361
11.05M
21:08/mi
2:26:28
↑ 172
Finish· 13.11 mi
15:02/mi
2:57:25
↑ 97↓ 114
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6.15M
1:11:4811:41 /mi⚡ faster
2nd Half
1:45:3715:11 /mi+47.1%
Positive split — 47.1% 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
18:2510:101.81 mi18:25
10:10
-
5.34M
1:00:1311:173.53 mi41:48
11:50
+1:40
6.15M
1:11:4811:410.81 mi11:35
14:18
+2:28
10.54M
2:15:4112:524.39 mi1:03:53
14:33
+0:15
11.05M
2:26:2813:150.51 mi10:47
21:08
+6:35
Finish(13.11 mi)
2:57:2513:322.06 mi30:57
15:02
-6:06
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

10:10 /mi

Average Pace

13:32 /mi

Slowest Pace

21:08 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:00:13

34% of race

Time at Steady Pace

1:46:25

60% of race

Time at Slower Pace

10:47

6% of race

Average Pace: 13:32 /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

CheckpointSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
1.81M1.81 mi4274152810742741528107
5.34M3.53 mi5565-12912198-670151-4459312412172
6.15M0.81 mi5816-2512342-144168-1766432826217
10.54M4.39 mi6437-6212707-365201-3367752928223
11.05M0.51 mi6486-492736-29207-668622977229
Finish(13.11 mi)2.06 mi6527-412761-25208-166072866221

Segment Performance Analysis

Start → 1.81M

0.0 - 1.8 mi

Top 60%
~flat
+4ft-3ft

Overall

4274

Females

1528

F40-44

107

1.81M→5.34M

1.8 - 5.3 mi

Top 84%
×4story building
+80ft-74ft

Overall

5931

Females

2412

F40-44

172

5.34M→6.15M

5.3 - 6.2 mi

Top 94%
×10story building
+126ft-4ft

Overall

6643

Females

2826

F40-44

217

6.15M→10.54M

6.2 - 10.5 mi

Top 95%
×21story building
+230ft-361ft

Overall

6775

Females

2928

F40-44

223

10.54M→11.05M

10.5 - 11.1 mi

Top 97%
×14story building
+172ft-0ft

Overall

6862

Females

2977

F40-44

229

11.05M→Finish

11.1 - 13.1 mi

Top 93%
×7story building
+97ft-114ft

Overall

6607

Females

2866

F40-44

221

Passing Analysis

Category:
▼Net Change
0
0 passed by0* passed
SegmentMovementRank
Start → 1.81M-#4274
1.81M → 5.34M
132938*-1291
#4274 → #5565
5.34M → 6.15M
2543-251
#5565 → #5816
6.15M → 10.54M
63716*-621
#5816 → #6437
10.54M → 11.05M
534-49
#6437 → #6486
11.05M → Finish
7231*-41
#6486 → #6527
TOTALS
234592*-2253
#4274 → #6527

* 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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