Boston Marathon logo
BOSTON MARATHON 2023

Isabelle Doucet

Bib: 21395•F

QC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:51
Rank: #20284
Start → 5K
27:51 | 8:58/mi
10K· 6.21 mi
55:42
Rank: #20490 (-206)
5K → 10K
27:51 | 8:58/mi
15K· 9.32 mi
1:23:58
Rank: #20611 (-121)
10K → 15K
28:16 | 9:06/mi
20K· 12.43 mi
1:53:01
Rank: #20751 (-140)
15K → 20K
29:03 | 9:21/mi
Half· 13.11 mi
1:59:12
Rank: #20745 (+6)
20K → Half
6:11 | 9:04/mi
25K· 15.53 mi
2:21:34
Rank: #20613 (+132)
Half → 25K
22:22 | 9:13/mi
30K· 18.64 mi
2:50:55
Rank: #20335 (+278)
25K → 30K
29:21 | 9:27/mi
20M
3:03:29
Rank: #20153 (+182)
30K → 20M
12:34 | 9:15/mi
21M
3:13:09
Rank: #19938 (+215)
20M → 21M
9:40 | 9:40/mi
35K· 21.75 mi
3:19:43
Rank: #19819 (+119)
21M → 35K
6:34 | 8:47/mi
23M
3:31:11
Rank: #19666 (+153)
35K → 23M
11:28 | 9:09/mi
24M
3:40:30
Rank: #19614 (+52)
23M → 24M
9:19 | 9:19/mi
40K· 24.85 mi
3:48:34
Rank: #19562 (+52)
24M → 40K
8:04 | 9:26/mi
25.2M
3:52:00
Rank: #19532 (+30)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
4:01:20
Rank: #19519 (+13)
25.2M → Finish
9:20 | 9:10/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:12
Pace9:06 /mi
2nd Half
Distance13.11 mi
Time2:02:08
Pace9:19 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:4127:518:5827:51
8:58
-
10K
6.21 mi11:49:3255:428:5827:51
8:58
0:00
15K
9.32 mi12:17:481:23:589:0128:16
9:06
+0:08
20K
12.43 mi12:46:511:53:019:0629:03
9:21
+0:15
Half
13.11 mi12:53:021:59:129:066:11
9:04
-0:17
25K
15.53 mi13:15:242:21:349:0722:22
9:13
+0:09
30K
18.64 mi13:44:452:50:559:1029:21
9:27
+0:14
20M
20.00 mi13:57:193:03:299:1012:34
9:15
-0:12
21M
21.00 mi14:06:593:13:099:129:40
9:40
+0:25
35K
21.75 mi14:13:333:19:439:116:34
8:47
-0:53
23M
23.00 mi14:25:013:31:119:1111:28
9:09
+0:22
24M
24.00 mi14:34:203:40:309:119:19
9:19
+0:10
40K
24.85 mi14:42:243:48:349:128:04
9:26
+0:07
25.2M
25.20 mi14:45:503:52:009:123:26
9:57
+0:31
Finish
26.22 mi14:55:104:01:209:139:20
9:10
-0:47

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

8:47 /mi

Average Pace

9:13 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:48:14

95% of race

Time at Steady Pace

13:06

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:12 /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 mi11:21:4127:518:5827:51
8:58
#20284
10K
6.21 mi11:49:3255:428:5827:51
8:58
#20490
15K
9.32 mi12:17:481:23:589:0128:16
9:06
#20611
20K
12.43 mi12:46:511:53:019:0629:03
9:21
#20751
Half
13.11 mi12:53:021:59:129:066:11
9:04
#20745
25K
15.53 mi13:15:242:21:349:0722:22
9:13
#20613
30K
18.64 mi13:44:452:50:559:1029:21
9:27
#20335
20M
20.00 mi13:57:193:03:299:1012:34
9:15
#20153
21M
21.00 mi14:06:593:13:099:129:40
9:40
#19938
35K
21.75 mi14:13:333:19:439:116:34
8:47
#19819
23M
23.00 mi14:25:013:31:119:1111:28
9:09
#19666
24M
24.00 mi14:34:203:40:309:119:19
9:19
#19614
40K
24.85 mi14:42:243:48:349:128:04
9:26
#19562
25.2M
25.20 mi14:45:503:52:009:123:26
9:57
#19532
Finish
26.22 mi14:55:104:01:209:139:20
9:10
#19519
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi202847991799120939(Top 79%)8201(Top 72%)8201(Top 451%)
10K6.21 mi3.10 mi20490-2068027-368027-3620730(Top 78%)8109(Top 71%)8109(Top 446%)
15K9.32 mi3.11 mi20611-1218079-528079-5220939(Top 79%)8201(Top 72%)8201(Top 451%)
20K12.43 mi3.11 mi20751-1408133-548133-5421094(Top 79%)8289(Top 73%)8289(Top 456%)
Half13.11 mi0.68 mi20745+68128+58128+520703(Top 78%)8065(Top 71%)8065(Top 444%)
25K15.53 mi2.42 mi20613+1328047+818047+8119941(Top 75%)7656(Top 67%)7656(Top 421%)
30K18.64 mi3.11 mi20335+2787917+1307917+13019247(Top 72%)7329(Top 64%)7329(Top 403%)
20M20.00 mi1.36 mi20153+1827833+847833+8417816(Top 67%)6650(Top 58%)6650(Top 366%)
21M21.00 mi1.00 mi19938+2157709+1247709+12416740(Top 63%)6043(Top 53%)6043(Top 333%)
35K21.75 mi0.75 mi19819+1197644+657644+6516883(Top 63%)6227(Top 55%)6227(Top 343%)
23M23.00 mi1.25 mi19666+1537564+807564+8016880(Top 63%)6230(Top 55%)6230(Top 343%)
24M24.00 mi1.00 mi19614+527545+197545+1918549(Top 70%)7200(Top 63%)7200(Top 396%)
40K24.85 mi0.85 mi19562+527523+227523+2218130(Top 68%)7016(Top 61%)7016(Top 386%)
25.2M25.20 mi0.35 mi19532+307513+107513+1017268(Top 65%)6594(Top 58%)6594(Top 363%)
Finish26.22 mi1.02 mi19519+137515-27515-218754(Top 70%)7310(Top 64%)7310(Top 402%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

20939

Females

8201

F45-49

8201

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

20730

Females

8109

F45-49

8109

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

20939

Females

8201

F45-49

8201

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

21094

Females

8289

F45-49

8289

20K→Half

12.4 - 13.1 mi

Top 78%
×2stories
+19ft-37ft

Overall

20703

Females

8065

F45-49

8065

Half→25K

13.1 - 15.5 mi

Top 75%
×4stories
+66ft-88ft

Overall

19941

Females

7656

F45-49

7656

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

19247

Females

7329

F45-49

7329

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17816

Females

6650

F45-49

6650

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

16740

Females

6043

F45-49

6043

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16883

Females

6227

F45-49

6227

35K→23M

21.8 - 23.0 mi

Top 63%
×5stories
+23ft-63ft

Overall

16880

Females

6230

F45-49

6230

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

18549

Females

7200

F45-49

7200

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18130

Females

7016

F45-49

7016

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17268

Females

6594

F45-49

6594

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

18754

Females

7310

F45-49

7310

Passing Analysis

Category:
Athletes Passed
1902
Passed By
1137
Net Change
+765
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20284
5K → 10K207413-206#20284#20490
10K → 15K130251-121#20490#20611
15K → 20K118258-140#20611#20751
20K → Half3125+6#20751#20745
Half → 25K17644+132#20745#20613
25K → 30K30931+278#20613#20335
30K → 20M1864+182#20335#20153
20M → 21M2238+215#20153#19938
21M → 35K1223+119#19938#19819
35K → 23M1629+153#19819#19666
23M → 24M7826+52#19666#19614
24M → 40K7018+52#19614#19562
40K → 25.2M399+30#19562#19532
25.2M → Finish5138+13#19532#19519
TOTALS19021137+765
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing