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BOSTON MARATHON 2023

Chelsea Osgood

Bib: 11157•F

OH

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0:00
/ mi
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Overall
#0 / 26622
Top 39%
Gender (Female)
#0 / 11423
Top 20%
Division (F18-39)
#0 / 4884
Top 35%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:56
Rank: #8696
Start → 5K
22:56 | 7:23/mi
10K· 6.21 mi
45:40
Rank: #8816 (-120)
5K → 10K
22:44 | 7:19/mi
15K· 9.32 mi
1:08:44
Rank: #9014 (-198)
10K → 15K
23:04 | 7:25/mi
20K· 12.43 mi
1:32:33
Rank: #9397 (-383)
15K → 20K
23:49 | 7:40/mi
Half· 13.11 mi
1:37:42
Rank: #9448 (-51)
20K → Half
5:09 | 7:33/mi
25K· 15.53 mi
1:56:31
Rank: #9662 (-214)
Half → 25K
18:49 | 7:46/mi
30K· 18.64 mi
2:21:30
Rank: #9913 (-251)
25K → 30K
24:59 | 8:02/mi
20M
2:32:54
Rank: #10122 (-209)
30K → 20M
11:24 | 8:24/mi
21M
2:41:18
Rank: #10066 (+56)
20M → 21M
8:24 | 8:24/mi
35K· 21.75 mi
2:47:22
Rank: #10159 (-93)
21M → 35K
6:04 | 8:07/mi
23M
2:57:51
Rank: #10268 (-109)
35K → 23M
10:29 | 8:22/mi
24M
3:06:00
Rank: #10346 (-78)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
3:12:58
Rank: #10347 (-1)
24M → 40K
6:58 | 8:09/mi
25.2M
3:16:01
Rank: #10361 (-14)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:24:01
Rank: #10357 (+4)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:42
Pace7:27 /mi
2nd Half
Distance13.11 mi
Time1:46:19
Pace8:07 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3322:567:2322:56
7:23
-
10K
6.21 mi11:12:1745:407:2122:44
7:19
-0:04
15K
9.32 mi11:35:211:08:447:2223:04
7:25
+0:06
20K
12.43 mi11:59:101:32:337:2723:49
7:40
+0:15
Half
13.11 mi12:04:191:37:427:275:09
7:33
-0:07
25K
15.53 mi12:23:081:56:317:3018:49
7:46
+0:13
30K
18.64 mi12:48:072:21:307:3524:59
8:02
+0:16
20M
20.00 mi12:59:312:32:547:3911:24
8:24
+0:22
21M
21.00 mi13:07:552:41:187:418:24
8:24
0:00
35K
21.75 mi13:13:592:47:227:426:04
8:07
-0:17
23M
23.00 mi13:24:282:57:517:4410:29
8:22
+0:15
24M
24.00 mi13:32:373:06:007:458:09
8:09
-0:13
40K
24.85 mi13:39:353:12:587:466:58
8:09
0:00
25.2M
25.20 mi13:42:383:16:017:473:03
8:51
+0:42
Finish
26.22 mi13:50:383:24:017:478:00
7:51
-1:00

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

7:19 /mi

Average Pace

7:47 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:31

57% of race

Time at Steady Pace

54:10

27% of race

Time at Slower Pace

33:20

16% of race

Average Pace: 7:47 /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 mi10:49:3322:567:2322:56
7:23
#8696
10K
6.21 mi11:12:1745:407:2122:44
7:19
#8816
15K
9.32 mi11:35:211:08:447:2223:04
7:25
#9014
20K
12.43 mi11:59:101:32:337:2723:49
7:40
#9397
Half
13.11 mi12:04:191:37:427:275:09
7:33
#9448
25K
15.53 mi12:23:081:56:317:3018:49
7:46
#9662
30K
18.64 mi12:48:072:21:307:3524:59
8:02
#9913
20M
20.00 mi12:59:312:32:547:3911:24
8:24
#10122
21M
21.00 mi13:07:552:41:187:418:24
8:24
#10066
35K
21.75 mi13:13:592:47:227:426:04
8:07
#10159
23M
23.00 mi13:24:282:57:517:4410:29
8:22
#10268
24M
24.00 mi13:32:373:06:007:458:09
8:09
#10346
40K
24.85 mi13:39:353:12:587:466:58
8:09
#10347
25.2M
25.20 mi13:42:383:16:017:473:03
8:51
#10361
Finish
26.22 mi13:50:383:24:017:478:00
7:51
#10357
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8696127712779573(Top 36%)1654(Top 14%)1654(Top 34%)
10K6.21 mi3.10 mi8816-1201336-591336-598999(Top 34%)1409(Top 12%)1409(Top 29%)
15K9.32 mi3.11 mi9014-1981429-931429-939573(Top 36%)1654(Top 14%)1654(Top 34%)
20K12.43 mi3.11 mi9397-3831591-1621591-16210647(Top 40%)2227(Top 19%)2227(Top 46%)
Half13.11 mi0.68 mi9448-511611-201611-2010674(Top 40%)2212(Top 19%)2212(Top 45%)
25K15.53 mi2.42 mi9662-2141710-991710-9910807(Top 41%)2392(Top 21%)2392(Top 49%)
30K18.64 mi3.11 mi9913-2511857-1471857-14711235(Top 42%)2753(Top 24%)2753(Top 56%)
20M20.00 mi1.36 mi10122-2091984-1271984-12713007(Top 49%)3872(Top 34%)3872(Top 79%)
21M21.00 mi1.00 mi10066+561978+61978+69792(Top 37%)2298(Top 20%)2298(Top 47%)
35K21.75 mi0.75 mi10159-932037-592037-5912844(Top 48%)3897(Top 34%)3897(Top 80%)
23M23.00 mi1.25 mi10268-1092128-912128-9112403(Top 47%)3733(Top 33%)3733(Top 76%)
24M24.00 mi1.00 mi10346-782196-682196-6812259(Top 46%)3719(Top 33%)3719(Top 76%)
40K24.85 mi0.85 mi10347-12226-302226-3011035(Top 41%)3160(Top 28%)3160(Top 65%)
25.2M25.20 mi0.35 mi10361-142251-252251-2511599(Top 44%)3495(Top 31%)3495(Top 72%)
Finish26.22 mi1.02 mi10357+42274-232274-2311057(Top 42%)3222(Top 28%)3222(Top 66%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21stories
+97ft-345ft

Overall

9573

Females

1654

F18-39

1654

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8999

Females

1409

F18-39

1409

10K→15K

6.2 - 9.3 mi

Top 36%
×3stories
+67ft-78ft

Overall

9573

Females

1654

F18-39

1654

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10647

Females

2227

F18-39

2227

20K→Half

12.4 - 13.1 mi

Top 40%
×2stories
+19ft-37ft

Overall

10674

Females

2212

F18-39

2212

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10807

Females

2392

F18-39

2392

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11235

Females

2753

F18-39

2753

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13007

Females

3872

F18-39

3872

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

9792

Females

2298

F18-39

2298

21M→35K

21.0 - 21.8 mi

Top 48%
×7stories
+17ft-86ft

Overall

12844

Females

3897

F18-39

3897

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

12403

Females

3733

F18-39

3733

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

12259

Females

3719

F18-39

3719

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11035

Females

3160

F18-39

3160

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11599

Females

3495

F18-39

3495

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11057

Females

3222

F18-39

3222

Passing Analysis

Category:
Athletes Passed
946*
Passed By
2606
Net Change
-1661
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8696
5K → 10K208328-120#8696#8816
10K → 15K85283-198#8816#9014
15K → 20K46429-383#9014#9397
20K → Half758-51#9397#9448
Half → 25K67281-214#9448#9662
25K → 30K88*339-251#9662#9913
30K → 20M40248-209#9913#10122
20M → 21M11256+56#10122#10066
21M → 35K23116-93#10066#10159
35K → 23M57166-109#10159#10268
23M → 24M36114-78#10268#10346
24M → 40K7576-1#10346#10347
40K → 25.2M2741-14#10347#10361
25.2M → Finish7571+4#10361#10357
TOTALS946*2606-1661

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

📊

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