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SF MARATHON 1ST HALF 2023

Qi Chai

Bib: 9804•M•Age: 41

Palo Alto, CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 6072
Top 18%
Gender (Male)
#0 / 3331
Top 25%
Masters (Masters Men)
#0 / 1028
Top 16%
Division (M40-44)
#0 / 332
Top 23%
Race Day Weather
60°/50°F
overcast clouds

⏱️ Race Timeline

Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
1.40M
7:59/mi
11:10
→ flat
2.13M
16:52/mi
23:29
→ flat
6.43M
10:08/mi
1:07:05
↑ 274↓ 780.9%
6.62M
-30:-53/mi
1:01:24
↑ 161.6%
10.65M
8:37/mi
1:36:07
↑ 153↓ 3611.0%
Finish· 13.11 mi
8:31/mi
1:57:04
↑ 244↓ 1141.0%

The Course

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Half Splits

1st Half· via 6.62M
Distance6.62 mi
Time1:01:24
Pace9:16 /mi
2nd Half✓ Faster
Distance6.49 mi
Time55:40
Pace8:35 /mi
📊Negative Split: 9.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
1.40M
1.40 mi06:44:1711:107:5911:10
7:59
-
2.13M
2.13 mi06:56:3623:2911:0112:19
16:52
+8:53
6.43M
6.43 mi07:40:121:07:0510:2643:36
10:08
-6:44
6.62M
6.62 mi07:34:311:01:249:16
-30:-53
-41:01
10.65M
10.65 mi08:09:141:36:079:0134:43
8:37
+39:30
Finish
13.11 mi08:30:111:57:048:5620:57
8:31
-0:06

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

-31:-53 /mi

Average Pace

8:56 /mi

Slowest Pace

16:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:04

100% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:56 /mi

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

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

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

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
1.40M
1.40 mi06:44:1711:107:5911:10
7:59
#837
2.13M
2.13 mi06:56:3623:2911:0112:19
16:52
#1038
6.43M
6.43 mi07:40:121:07:0510:2643:36
10:08
#993
6.62M
6.62 mi07:34:311:01:249:16
-30:-53
#992
10.65M
10.65 mi08:09:141:36:079:0134:43
8:37
#1000
Finish
13.11 mi08:30:111:57:048:5620:57
8:31
#1089
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
1.40M1.40 mi1.40 mi83762762837(Top 14%)627(Top 19%)62(Top 19%)
2.13M2.13 mi0.73 mi1038-201764-13774-121308(Top 22%)934(Top 28%)85(Top 26%)
6.43M6.43 mi4.30 mi993+45749+1568+61028(Top 17%)771(Top 23%)73(Top 22%)
6.62M6.62 mi0.19 mi992+1744+571-3---
10.65M10.65 mi4.03 mi1000-8754-1068+31179(Top 19%)874(Top 26%)81(Top 24%)
Finish13.11 mi2.46 mi1089-89817-6375-71556(Top 26%)1106(Top 33%)103(Top 31%)

Segment Performance Analysis

Start → 1.40M

0.0 - 1.4 mi

Top 14%
~flat
+3ft-2ft

Overall

837

Males

627

M40-44

62

1.40M→2.13M

1.4 - 2.1 mi

Top 22%
~flat
+3ft-1ft

Overall

1308

Males

934

M40-44

87

2.13M→6.43M

2.1 - 6.4 mi

Top 17%
×17story building
+274ft-78ft

Overall

1028

Males

771

M40-44

73

6.43M→6.62M

6.4 - 6.6 mi

×1story
+16ft-0ft

Overall

-

Males

-

M40-44

-

6.62M→10.65M

6.6 - 10.7 mi

Top 19%
×21story building
+153ft-361ft

Overall

1179

Males

874

M40-44

81

10.65M→Finish

10.7 - 13.1 mi

Top 26%
×17story building
+244ft-114ft

Overall

1556

Males

1106

M40-44

103

Passing Analysis

Category:
Athletes Passed
271*
Passed By
523
Net Change
-252
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 1.40M----#837
1.40M → 2.13M26227-201#837#1038
2.13M → 6.43M138*93+45#1038#993
6.43M → 6.62M2625+1#993#992
6.62M → 10.65M59*67-8#992#1000
10.65M → Finish22*111-89#1000#1089
TOTALS271*523-252

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

📊

Passing Visuals

Category:
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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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