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BOSTON MARATHON 2023

Rebecca Bellew

Bib: 31879•F

MA

0:00
0:00
/ mi
Masters
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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

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
8:37/mi
26:47
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
52:56
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:20:21
↑ 67↓ 78
20K· 12.43 mi
8:39/mi
1:47:15
↑ 106↓ 860.1%
Half· 13.11 mi
9:02/mi
1:53:25
↑ 19↓ 370.5%
25K· 15.53 mi
9:17/mi
2:15:56
↑ 66↓ 880.2%
30K· 18.64 mi
9:53/mi
2:46:37
↑ 181↓ 1480.2%
20M
9:46/mi
2:59:53
↑ 64↓ 500.2%
21M
10:20/mi
3:10:13
↑ 106↓ 241.6%
35K· 21.75 mi
9:23/mi
3:17:14
↑ 17↓ 861.7%
23M
10:05/mi
3:29:51
↑ 23↓ 630.6%
24M
9:46/mi
3:39:37
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:47:52
↓ 200.3%
25.2M
10:06/mi
3:51:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:52/mi
4:00:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:25
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time2:06:58
Pace9:41 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0826:478:3726:47
8:37
-
10K
6.21 mi12:12:1752:568:3126:09
8:25
-0:12
15K
9.32 mi12:39:421:20:218:3727:25
8:49
+0:24
20K
12.43 mi13:06:361:47:158:3826:54
8:39
-0:10
Half
13.11 mi13:12:461:53:258:396:10
9:02
+0:23
25K
15.53 mi13:35:172:15:568:4522:31
9:17
+0:15
30K
18.64 mi14:05:582:46:378:5630:41
9:53
+0:36
20M
20.00 mi14:19:142:59:539:0013:16
9:46
-0:07
21M
21.00 mi14:29:343:10:139:0310:20
10:20
+0:34
35K
21.75 mi14:36:353:17:149:047:01
9:23
-0:57
23M
23.00 mi14:49:123:29:519:0712:37
10:05
+0:42
24M
24.00 mi14:58:583:39:379:099:46
9:46
-0:19
40K
24.85 mi15:07:133:47:529:108:15
9:39
-0:07
25.2M
25.20 mi15:10:423:51:219:113:29
10:06
+0:27
Finish
26.22 mi15:19:444:00:239:109:02
8:52
-1:14

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

8:25 /mi

Average Pace

9:10 /mi

Slowest Pace

10:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:27

51% of race

Time at Steady Pace

37:47

16% of race

Time at Slower Pace

1:20:09

33% of race

Average Pace: 9:10 /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 mi11:46:0826:478:3726:47
8:37
#18361
10K
6.21 mi12:12:1752:568:3126:09
8:25
#18024
15K
9.32 mi12:39:421:20:218:3727:25
8:49
#18600
20K
12.43 mi13:06:361:47:158:3826:54
8:39
#18391
Half
13.11 mi13:12:461:53:258:396:10
9:02
#18531
25K
15.53 mi13:35:172:15:568:4522:31
9:17
#18853
30K
18.64 mi14:05:582:46:378:5630:41
9:53
#19306
20M
20.00 mi14:19:142:59:539:0013:16
9:46
#19339
21M
21.00 mi14:29:343:10:139:0310:20
10:20
#19318
35K
21.75 mi14:36:353:17:149:047:01
9:23
#19330
23M
23.00 mi14:49:123:29:519:0712:37
10:05
#19420
24M
24.00 mi14:58:583:39:379:099:46
9:46
#19457
40K
24.85 mi15:07:133:47:529:108:15
9:39
#19453
25.2M
25.20 mi15:10:423:51:219:113:29
10:06
#19434
Finish
26.22 mi15:19:444:00:239:109:02
8:52
#19382
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi183616788678819657(Top 74%)7480(Top 65%)7480(Top 412%)
10K6.21 mi3.10 mi18024+3376550+2386550+23817696(Top 66%)6308(Top 55%)6308(Top 347%)
15K9.32 mi3.11 mi18600-5766881-3316881-33119657(Top 74%)7480(Top 65%)7480(Top 412%)
20K12.43 mi3.11 mi18391+2096748+1336748+13317882(Top 67%)6447(Top 56%)6447(Top 355%)
Half13.11 mi0.68 mi18531-1406823-756823-7520604(Top 77%)8017(Top 70%)8017(Top 441%)
25K15.53 mi2.42 mi18853-3227038-2157038-21520161(Top 76%)7786(Top 68%)7786(Top 429%)
30K18.64 mi3.11 mi19306-4537319-2817319-28120691(Top 78%)8163(Top 71%)8163(Top 449%)
20M20.00 mi1.36 mi19339-337351-327351-3219751(Top 74%)7726(Top 68%)7726(Top 425%)
21M21.00 mi1.00 mi19318+217354-37354-319129(Top 72%)7415(Top 65%)7415(Top 408%)
35K21.75 mi0.75 mi19330-127368-147368-1419468(Top 73%)7641(Top 67%)7641(Top 421%)
23M23.00 mi1.25 mi19420-907416-487416-4820217(Top 76%)8087(Top 71%)8087(Top 445%)
24M24.00 mi1.00 mi19457-377458-427458-4220117(Top 76%)8035(Top 70%)8035(Top 442%)
40K24.85 mi0.85 mi19453+47465-77465-718876(Top 71%)7426(Top 65%)7426(Top 409%)
25.2M25.20 mi0.35 mi19434+197453+127453+1217837(Top 67%)6887(Top 60%)6887(Top 379%)
Finish26.22 mi1.02 mi19382+527425+287425+2817367(Top 65%)6575(Top 58%)6575(Top 362%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19657

Females

7480

F45-49

7480

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17696

Females

6308

F45-49

6308

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19657

Females

7480

F45-49

7480

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17882

Females

6447

F45-49

6447

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

20604

Females

8017

F45-49

8017

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

20161

Females

7786

F45-49

7786

25K→30K

15.5 - 18.6 mi

Top 78%
×9story building
+181ft-148ft

Overall

20691

Females

8163

F45-49

8163

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19751

Females

7726

F45-49

7726

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

19129

Females

7415

F45-49

7415

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19468

Females

7641

F45-49

7641

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20217

Females

8087

F45-49

8087

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

20117

Females

8035

F45-49

8035

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18876

Females

7426

F45-49

7426

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

17837

Females

6887

F45-49

6887

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

17367

Females

6575

F45-49

6575

Passing Analysis

Category:
Athletes Passed
1420
Passed By
2441
Net Change
-1021
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18361
5K → 10K531194+337#18361#18024
10K → 15K44620-576#18024#18600
15K → 20K27162+209#18600#18391
20K → Half5145-140#18391#18531
Half → 25K50372-322#18531#18853
25K → 30K64517-453#18853#19306
30K → 20M73106-33#19306#19339
20M → 21M9170+21#19339#19318
21M → 35K3648-12#19318#19330
35K → 23M53143-90#19330#19420
23M → 24M4784-37#19420#19457
24M → 40K4541+4#19457#19453
40K → 25.2M3112+19#19453#19434
25.2M → Finish7927+52#19434#19382
TOTALS14202441-1021
📊

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