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BOSTON MARATHON 2023

Isabella Chao

Bib: 15071•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 24%
Gender (Female)
#0 / 11423
Top 6%
Division (F18-39)
#0 / 4884
Top 12%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:22
Rank: #9809
Start → 5K
23:22 | 7:31/mi
10K· 6.21 mi
46:06
Rank: #9337 (+472)
5K → 10K
22:44 | 7:19/mi
15K· 9.32 mi
1:08:31
Rank: #8850 (+487)
10K → 15K
22:25 | 7:13/mi
20K· 12.43 mi
1:30:59
Rank: #8403 (+447)
15K → 20K
22:28 | 7:14/mi
Half· 13.11 mi
1:35:50
Rank: #8334 (+69)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:53:23
Rank: #8064 (+270)
Half → 25K
17:33 | 7:14/mi
30K· 18.64 mi
2:16:09
Rank: #7661 (+403)
25K → 30K
22:46 | 7:20/mi
20M
2:26:08
Rank: #7483 (+178)
30K → 20M
9:59 | 7:21/mi
21M
2:33:45
Rank: #7338 (+145)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:39:04
Rank: #7265 (+73)
21M → 35K
5:19 | 7:06/mi
23M
2:48:01
Rank: #7036 (+229)
35K → 23M
8:57 | 7:09/mi
24M
2:54:55
Rank: #6869 (+167)
23M → 24M
6:54 | 6:54/mi
40K· 24.85 mi
3:00:53
Rank: #6711 (+158)
24M → 40K
5:58 | 6:59/mi
25.2M
3:03:23
Rank: #6624 (+87)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
3:10:14
Rank: #6476 (+148)
25.2M → Finish
6:51 | 6:43/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:35:50
Pace7:19 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:34:24
Pace7:12 /mi
📊Negative Split: 1.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:5923:227:3123:22
7:31
-
10K
6.21 mi11:15:4346:067:2522:44
7:19
-0:12
15K
9.32 mi11:38:081:08:317:2122:25
7:13
-0:06
20K
12.43 mi12:00:361:30:597:1922:28
7:14
+0:01
Half
13.11 mi12:05:271:35:507:194:51
7:07
-0:07
25K
15.53 mi12:23:001:53:237:1817:33
7:14
+0:07
30K
18.64 mi12:45:462:16:097:1822:46
7:20
+0:06
20M
20.00 mi12:55:452:26:087:189:59
7:21
+0:01
21M
21.00 mi13:03:222:33:457:197:37
7:37
+0:16
35K
21.75 mi13:08:412:39:047:195:19
7:06
-0:31
23M
23.00 mi13:17:382:48:017:188:57
7:09
+0:03
24M
24.00 mi13:24:322:54:557:176:54
6:54
-0:15
40K
24.85 mi13:30:303:00:537:175:58
6:59
+0:05
25.2M
25.20 mi13:33:003:03:237:172:30
7:15
+0:16
Finish
26.22 mi13:39:513:10:147:166:51
6:43
-0:32

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

6:43 /mi

Average Pace

7:16 /mi

Slowest Pace

7:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:39:15

84% of race

Time at Steady Pace

30:59

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:15 /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 mi10:52:5923:227:3123:22
7:31
#9809
10K
6.21 mi11:15:4346:067:2522:44
7:19
#9337
15K
9.32 mi11:38:081:08:317:2122:25
7:13
#8850
20K
12.43 mi12:00:361:30:597:1922:28
7:14
#8403
Half
13.11 mi12:05:271:35:507:194:51
7:07
#8334
25K
15.53 mi12:23:001:53:237:1817:33
7:14
#8064
30K
18.64 mi12:45:462:16:097:1822:46
7:20
#7661
20M
20.00 mi12:55:452:26:087:189:59
7:21
#7483
21M
21.00 mi13:03:222:33:457:197:37
7:37
#7338
35K
21.75 mi13:08:412:39:047:195:19
7:06
#7265
23M
23.00 mi13:17:382:48:017:188:57
7:09
#7036
24M
24.00 mi13:24:322:54:557:176:54
6:54
#6869
40K
24.85 mi13:30:303:00:537:175:58
6:59
#6711
25.2M
25.20 mi13:33:003:03:237:172:30
7:15
#6624
Finish
26.22 mi13:39:513:10:147:166:51
6:43
#6476
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9809175417547907(Top 30%)1036(Top 9%)1036(Top 21%)
10K6.21 mi3.10 mi9337+4721543+2111543+2118986(Top 34%)1396(Top 12%)1396(Top 29%)
15K9.32 mi3.11 mi8850+4871366+1771366+1777907(Top 30%)1036(Top 9%)1036(Top 21%)
20K12.43 mi3.11 mi8403+4471198+1681198+1687308(Top 27%)867(Top 8%)867(Top 18%)
Half13.11 mi0.68 mi8334+691174+241174+247270(Top 27%)836(Top 7%)836(Top 17%)
25K15.53 mi2.42 mi8064+2701097+771097+776900(Top 26%)803(Top 7%)803(Top 16%)
30K18.64 mi3.11 mi7661+403981+116981+1166199(Top 23%)681(Top 6%)681(Top 14%)
20M20.00 mi1.36 mi7483+178949+32949+325926(Top 22%)690(Top 6%)690(Top 14%)
21M21.00 mi1.00 mi7338+145914+35914+355217(Top 20%)588(Top 5%)588(Top 12%)
35K21.75 mi0.75 mi7265+73902+12902+125988(Top 22%)758(Top 7%)758(Top 16%)
23M23.00 mi1.25 mi7036+229853+49853+494578(Top 17%)435(Top 4%)435(Top 9%)
24M24.00 mi1.00 mi6869+167820+33820+334206(Top 16%)382(Top 3%)382(Top 8%)
40K24.85 mi0.85 mi6711+158789+31789+313768(Top 14%)372(Top 3%)372(Top 8%)
25.2M25.20 mi0.35 mi6624+87774+15774+152820(Top 11%)239(Top 2%)239(Top 5%)
Finish26.22 mi1.02 mi6476+148740+34740+343673(Top 14%)397(Top 3%)397(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

7907

Females

1036

F18-39

1036

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8986

Females

1396

F18-39

1396

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

7907

Females

1036

F18-39

1036

15K→20K

9.3 - 12.4 mi

Top 27%
×5stories
+106ft-86ft

Overall

7308

Females

867

F18-39

867

20K→Half

12.4 - 13.1 mi

Top 27%
×2stories
+19ft-37ft

Overall

7270

Females

836

F18-39

836

Half→25K

13.1 - 15.5 mi

Top 26%
×4stories
+66ft-88ft

Overall

6900

Females

803

F18-39

803

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6199

Females

681

F18-39

681

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

5926

Females

690

F18-39

690

20M→21M

20.0 - 21.0 mi

Top 20%
×8stories
+106ft-24ft

Overall

5217

Females

588

F18-39

588

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

5988

Females

758

F18-39

758

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4578

Females

435

F18-39

435

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4206

Females

382

F18-39

382

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3768

Females

372

F18-39

372

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2820

Females

239

F18-39

239

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3673

Females

397

F18-39

397

Passing Analysis

Category:
Athletes Passed
3521
Passed By
188
Net Change
+3333
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9809
5K → 10K584112+472#9809#9337
10K → 15K50215+487#9337#8850
15K → 20K4547+447#8850#8403
20K → Half701+69#8403#8334
Half → 25K28515+270#8334#8064
25K → 30K4063+403#8064#7661
30K → 20M1846+178#7661#7483
20M → 21M1538+145#7483#7338
21M → 35K8411+73#7338#7265
35K → 23M2334+229#7265#7036
23M → 24M1681+167#7036#6869
24M → 40K1613+158#6869#6711
40K → 25.2M870+87#6711#6624
25.2M → Finish1502+148#6624#6476
TOTALS3521188+3333
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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