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BOSTON MARATHON 2023

Sydney Chai

Bib: 14521•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 36%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:17/mi
25:43
↑ 97↓ 3451.5%
10K· 6.21 mi
8:20/mi
51:37
↑ 79↓ 1380.4%
15K· 9.32 mi
8:18/mi
1:17:24
↑ 67↓ 78
20K· 12.43 mi
8:19/mi
1:43:13
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:48:45
↑ 19↓ 370.5%
25K· 15.53 mi
8:13/mi
2:08:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:34:25
↑ 181↓ 1480.2%
20M
8:21/mi
2:45:46
↑ 64↓ 500.2%
21M
8:35/mi
2:54:21
↑ 106↓ 241.6%
35K· 21.75 mi
7:56/mi
3:00:17
↑ 17↓ 861.7%
23M
8:06/mi
3:10:25
↑ 23↓ 630.6%
24M
7:46/mi
3:18:11
↓ 821.3%
40K· 24.85 mi
7:45/mi
3:24:49
↓ 200.3%
25.2M
8:10/mi
3:27:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:16/mi
3:35:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:48:45
Pace8:18 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:17
Pace8:06 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:3925:438:1725:43
8:17
-
10K
6.21 mi11:21:3351:378:1825:54
8:20
+0:03
15K
9.32 mi11:47:201:17:248:1825:47
8:18
-0:02
20K
12.43 mi12:13:091:43:138:1825:49
8:19
+0:01
Half
13.11 mi12:18:411:48:458:185:32
8:07
-0:12
25K
15.53 mi12:38:372:08:418:1719:56
8:13
+0:06
30K
18.64 mi13:04:212:34:258:1725:44
8:17
+0:04
20M
20.00 mi13:15:422:45:468:1711:21
8:21
+0:04
21M
21.00 mi13:24:172:54:218:188:35
8:35
+0:14
35K
21.75 mi13:30:133:00:178:175:56
7:56
-0:39
23M
23.00 mi13:40:213:10:258:1710:08
8:06
+0:10
24M
24.00 mi13:48:073:18:118:157:46
7:46
-0:20
40K
24.85 mi13:54:453:24:498:146:38
7:45
-0:01
25.2M
25.20 mi13:57:343:27:388:142:49
8:10
+0:25
Finish
26.22 mi14:04:583:35:028:127:24
7:16
-0:54

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

7:16 /mi

Average Pace

8:12 /mi

Slowest Pace

8:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

27:44

13% of race

Time at Steady Pace

2:58:43

83% of race

Time at Slower Pace

8:35

4% of race

Average Pace: 8:12 /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...
0mi6.6mi13.1mi19.7mi26.2mi
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
5K
3.11 mi10:55:3925:438:1725:43
8:17
#15995
10K
6.21 mi11:21:3351:378:1825:54
8:20
#16549
15K
9.32 mi11:47:201:17:248:1825:47
8:18
#16543
20K
12.43 mi12:13:091:43:138:1825:49
8:19
#16318
Half
13.11 mi12:18:411:48:458:185:32
8:07
#16249
25K
15.53 mi12:38:372:08:418:1719:56
8:13
#15929
30K
18.64 mi13:04:212:34:258:1725:44
8:17
#15363
20M
20.00 mi13:15:422:45:468:1711:21
8:21
#15154
21M
21.00 mi13:24:172:54:218:188:35
8:35
#14905
35K
21.75 mi13:30:133:00:178:175:56
7:56
#14769
23M
23.00 mi13:40:213:10:258:1710:08
8:06
#14524
24M
24.00 mi13:48:073:18:118:157:46
7:46
#14301
40K
24.85 mi13:54:453:24:498:146:38
7:45
#14058
25.2M
25.20 mi13:57:343:27:388:142:49
8:10
#13935
Finish
26.22 mi14:04:583:35:028:127:24
7:16
#13642
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi159955277527716523(Top 62%)5602(Top 49%)5602(Top 115%)
10K6.21 mi3.10 mi16549-5545607-3305607-33017159(Top 64%)5967(Top 52%)5967(Top 122%)
15K9.32 mi3.11 mi16543+65624-175624-1716523(Top 62%)5602(Top 49%)5602(Top 115%)
20K12.43 mi3.11 mi16318+2255498+1265498+12615660(Top 59%)5132(Top 45%)5132(Top 105%)
Half13.11 mi0.68 mi16249+695456+425456+4215215(Top 57%)4800(Top 42%)4800(Top 98%)
25K15.53 mi2.42 mi15929+3205292+1645292+16414396(Top 54%)4448(Top 39%)4448(Top 91%)
30K18.64 mi3.11 mi15363+5664986+3064986+30612934(Top 49%)3718(Top 33%)3718(Top 76%)
20M20.00 mi1.36 mi15154+2094872+1144872+11412733(Top 48%)3704(Top 32%)3704(Top 76%)
21M21.00 mi1.00 mi14905+2494733+1394733+13911009(Top 41%)2882(Top 25%)2882(Top 59%)
35K21.75 mi0.75 mi14769+1364663+704663+7011683(Top 44%)3262(Top 29%)3262(Top 67%)
23M23.00 mi1.25 mi14524+2454539+1244539+12410462(Top 39%)2756(Top 24%)2756(Top 56%)
24M24.00 mi1.00 mi14301+2234429+1104429+1109597(Top 36%)2407(Top 21%)2407(Top 49%)
40K24.85 mi0.85 mi14058+2434306+1234306+1238441(Top 32%)1931(Top 17%)1931(Top 40%)
25.2M25.20 mi0.35 mi13935+1234238+684238+687632(Top 29%)1702(Top 15%)1702(Top 35%)
Finish26.22 mi1.02 mi13642+2934077+1614077+1616898(Top 26%)1403(Top 12%)1403(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

16523

Females

5602

F18-39

5602

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

17159

Females

5967

F18-39

5967

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

16523

Females

5602

F18-39

5602

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15660

Females

5132

F18-39

5132

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15215

Females

4800

F18-39

4800

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

14396

Females

4448

F18-39

4448

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

12934

Females

3718

F18-39

3718

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

12733

Females

3704

F18-39

3704

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

11009

Females

2882

F18-39

2882

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

11683

Females

3262

F18-39

3262

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

10462

Females

2756

F18-39

2756

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

9597

Females

2407

F18-39

2407

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8441

Females

1931

F18-39

1931

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7632

Females

1702

F18-39

1702

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

6898

Females

1403

F18-39

1403

Passing Analysis

Category:
Athletes Passed
3342
Passed By
989
Net Change
+2353
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15995
5K → 10K112666-554#15995#16549
10K → 15K204198+6#16549#16543
15K → 20K29267+225#16543#16318
20K → Half7910+69#16318#16249
Half → 25K33616+320#16249#15929
25K → 30K5748+566#15929#15363
30K → 20M22011+209#15363#15154
20M → 21M2501+249#15154#14905
21M → 35K1382+136#14905#14769
35K → 23M2516+245#14769#14524
23M → 24M2252+223#14524#14301
24M → 40K2430+243#14301#14058
40K → 25.2M1241+123#14058#13935
25.2M → Finish2941+293#13935#13642
TOTALS3342989+2353
📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing