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SF MARATHON 1ST HALF 2023

Alexandra Perkins

Alameda, CA

Bib: 13960 F 24

0:00
0:00
/ mi
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Overall
#0 / 6072
Top 48%
Gender (Female)
#0 / 2732
Top 38%
F20-29
#0 / 376
Race Day Weather
60°/50°F
overcast clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
1.40M
9:02/mi
12:39
→ flat
2.13M
19:30/mi
26:53
→ flat
6.43M
12:07/mi
1:19:00
↑ 274↓ 78
6.62M
-37:-54/mi
1:11:59
↑ 16
10.65M
10:05/mi
1:52:37
↑ 153↓ 361
Finish· 13.11 mi
9:29/mi
2:15:55
↑ 244↓ 114
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6.62M
1:11:5910:52 /mi+11.2%
2nd Half
1:03:569:51 /mi✓ faster
Negative split — 11.2% faster in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
1.40M
12:399:021.40 mi12:39
9:02
-
2.13M
26:5312:370.73 mi14:14
19:30
+10:28
6.43M
1:19:0012:174.30 mi52:07
12:07
-7:23
6.62M
1:11:5910:520.19 mi
-37:-54
-50:01
10.65M
1:52:3710:344.03 mi40:38
10:05
+47:59
Finish(13.11 mi)
2:15:5510:222.46 mi23:18
9:29
-0:36
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

-38:-54 /mi

Average Pace

10:22 /mi

Slowest Pace

19:30 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:15:55

100% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

0:00

0% 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

CheckpointSeg. DistOverallFemalesF20-29Seg. OverallSeg. FemalesSeg. F20-29
1.40M1.40 mi24488141472448814147
2.13M0.73 mi2839-391986-172175-2833611232213
6.43M4.30 mi3074-2351097-111200-2532651187209
6.62M0.19 mi3045+291087+10196+4---
10.65M4.03 mi3032+131066+21194+230801107198
Finish(13.11 mi)2.46 mi2937+951036+30191+32686967187

Segment Performance Analysis

Start → 1.40M

0.0 - 1.4 mi

Top 40%
~flat
+3ft-2ft

Overall

2448

Females

814

F20-24

147

1.40M→2.13M

1.4 - 2.1 mi

Top 55%
~flat
+3ft-1ft

Overall

3361

Females

1232

F20-24

213

2.13M→6.43M

2.1 - 6.4 mi

Top 54%
×17story building
+274ft-78ft

Overall

3265

Females

1187

F20-24

209

6.43M→6.62M

6.4 - 6.6 mi

×1story
+16ft-0ft

Overall

-

Females

-

F20-24

-

6.62M→10.65M

6.6 - 10.7 mi

Top 51%
×21story building
+153ft-361ft

Overall

3080

Females

1107

F20-24

198

10.65M→Finish

10.7 - 13.1 mi

Top 44%
×17story building
+244ft-114ft

Overall

2686

Females

967

F20-24

187

Passing Analysis

Category:
▼Net Change
0
0 passed by0* passed
SegmentMovementRank
Start → 1.40M-#2448
1.40M → 2.13M
44857-391
#2448 → #2839
2.13M → 6.43M
409174*-235
#2839 → #3074
6.43M → 6.62M
4978+29
#3074 → #3045
6.62M → 10.65M
132145*+13
#3045 → #3032
10.65M → Finish
52147*+95
#3032 → #2937
TOTALS
1090601*-489
#2448 → #2937

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

Passing Visualized

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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

The San Francisco Marathon

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