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BOSTON MARATHON 2023

Gretchen Brosius

Bib: 23338•F

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:19
Rank: #17379
Start → 5K
26:19 | 8:28/mi
10K· 6.21 mi
52:51
Rank: #17944 (-565)
5K → 10K
26:32 | 8:32/mi
15K· 9.32 mi
1:19:39
Rank: #18146 (-202)
10K → 15K
26:48 | 8:38/mi
20K· 12.43 mi
1:47:06
Rank: #18315 (-169)
15K → 20K
27:27 | 8:50/mi
Half· 13.11 mi
1:52:58
Rank: #18310 (+5)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:14:14
Rank: #18217 (+93)
Half → 25K
21:16 | 8:46/mi
30K· 18.64 mi
2:42:20
Rank: #18030 (+187)
25K → 30K
28:06 | 9:03/mi
20M
2:54:57
Rank: #18019 (+11)
30K → 20M
12:37 | 9:17/mi
21M
3:05:00
Rank: #18019
20M → 21M
10:03 | 10:03/mi
35K· 21.75 mi
3:11:59
Rank: #18098 (-79)
21M → 35K
6:59 | 9:20/mi
23M
3:24:09
Rank: #18183 (-85)
35K → 23M
12:10 | 9:43/mi
24M
3:33:54
Rank: #18307 (-124)
23M → 24M
9:45 | 9:45/mi
40K· 24.85 mi
3:42:30
Rank: #18412 (-105)
24M → 40K
8:36 | 10:04/mi
25.2M
3:46:14
Rank: #18452 (-40)
40K → 25.2M
3:44 | 10:50/mi
Finish· 26.22 mi
3:56:19
Rank: #18626 (-174)
25.2M → Finish
10:05 | 9:54/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:58
Pace8:37 /mi
2nd Half
Distance13.11 mi
Time2:03:21
Pace9:25 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:5326:198:2826:19
8:28
-
10K
6.21 mi11:48:2552:518:3026:32
8:32
+0:04
15K
9.32 mi12:15:131:19:398:3326:48
8:38
+0:06
20K
12.43 mi12:42:401:47:068:3727:27
8:50
+0:12
Half
13.11 mi12:48:321:52:588:375:52
8:36
-0:14
25K
15.53 mi13:09:482:14:148:3821:16
8:46
+0:10
30K
18.64 mi13:37:542:42:208:4328:06
9:03
+0:17
20M
20.00 mi13:50:312:54:578:4512:37
9:17
+0:14
21M
21.00 mi14:00:343:05:008:4910:03
10:03
+0:46
35K
21.75 mi14:07:333:11:598:506:59
9:20
-0:43
23M
23.00 mi14:19:433:24:098:5312:10
9:43
+0:23
24M
24.00 mi14:29:283:33:548:559:45
9:45
+0:02
40K
24.85 mi14:38:043:42:308:578:36
10:04
+0:19
25.2M
25.20 mi14:41:483:46:148:593:44
10:50
+0:46
Finish
26.22 mi14:51:533:56:199:0110:05
9:54
-0:56

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

8:28 /mi

Average Pace

9:01 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14:14

57% of race

Time at Steady Pace

47:42

20% of race

Time at Slower Pace

54:23

23% of race

Average Pace: 9:01 /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 mi11:21:5326:198:2826:19
8:28
#17379
10K
6.21 mi11:48:2552:518:3026:32
8:32
#17944
15K
9.32 mi12:15:131:19:398:3326:48
8:38
#18146
20K
12.43 mi12:42:401:47:068:3727:27
8:50
#18315
Half
13.11 mi12:48:321:52:588:375:52
8:36
#18310
25K
15.53 mi13:09:482:14:148:3821:16
8:46
#18217
30K
18.64 mi13:37:542:42:208:4328:06
9:03
#18030
20M
20.00 mi13:50:312:54:578:4512:37
9:17
#18019
21M
21.00 mi14:00:343:05:008:4910:03
10:03
#18019
35K
21.75 mi14:07:333:11:598:506:59
9:20
#18098
23M
23.00 mi14:19:433:24:098:5312:10
9:43
#18183
24M
24.00 mi14:29:283:33:548:559:45
9:45
#18307
40K
24.85 mi14:38:043:42:308:578:36
10:04
#18412
25.2M
25.20 mi14:41:483:46:148:593:44
10:50
#18452
Finish
26.22 mi14:51:533:56:199:0110:05
9:54
#18626
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi173796184618418613(Top 70%)6866(Top 60%)6866(Top 842%)
10K6.21 mi3.10 mi17944-5656497-3136497-31318503(Top 70%)6769(Top 59%)6769(Top 831%)
15K9.32 mi3.11 mi18146-2026613-1166613-11618613(Top 70%)6866(Top 60%)6866(Top 842%)
20K12.43 mi3.11 mi18315-1696700-876700-8718865(Top 71%)7007(Top 61%)7007(Top 860%)
Half13.11 mi0.68 mi18310+56697+36697+318375(Top 69%)6710(Top 59%)6710(Top 823%)
25K15.53 mi2.42 mi18217+936659+386659+3817803(Top 67%)6464(Top 57%)6464(Top 793%)
30K18.64 mi3.11 mi18030+1876587+726587+7217421(Top 65%)6315(Top 55%)6315(Top 775%)
20M20.00 mi1.36 mi18019+116598-116598-1117968(Top 67%)6728(Top 59%)6728(Top 826%)
21M21.00 mi1.00 mi180196603-56603-518218(Top 68%)6883(Top 60%)6883(Top 845%)
35K21.75 mi0.75 mi18098-796656-536656-5319302(Top 73%)7543(Top 66%)7543(Top 926%)
23M23.00 mi1.25 mi18183-856718-626718-6219145(Top 72%)7493(Top 66%)7493(Top 919%)
24M24.00 mi1.00 mi18307-1246806-886806-8820062(Top 75%)8002(Top 70%)8002(Top 982%)
40K24.85 mi0.85 mi18412-1056873-676873-6720135(Top 76%)8125(Top 71%)8125(Top 997%)
25.2M25.20 mi0.35 mi18452-406899-266899-2620049(Top 75%)8080(Top 71%)8080(Top 991%)
Finish26.22 mi1.02 mi18626-1747008-1097008-10921467(Top 81%)8823(Top 77%)8823(Top 1083%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18613

Females

6866

F55-59

6866

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18503

Females

6769

F55-59

6769

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18613

Females

6866

F55-59

6866

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18865

Females

7007

F55-59

7007

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

18375

Females

6710

F55-59

6710

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17803

Females

6464

F55-59

6464

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

17421

Females

6315

F55-59

6315

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17968

Females

6728

F55-59

6728

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

18218

Females

6883

F55-59

6883

21M→35K

21.0 - 21.8 mi

Top 73%
×7stories
+17ft-86ft

Overall

19302

Females

7543

F55-59

7543

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19145

Females

7493

F55-59

7493

23M→24M

23.0 - 24.0 mi

Top 75%
×6stories
+12ft-82ft

Overall

20062

Females

8002

F55-59

8002

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20135

Females

8125

F55-59

8125

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

20049

Females

8080

F55-59

8080

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21467

Females

8823

F55-59

8823

Passing Analysis

Category:
Athletes Passed
1178
Passed By
2425
Net Change
-1247
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17379
5K → 10K117682-565#17379#17944
10K → 15K115317-202#17944#18146
15K → 20K115284-169#18146#18315
20K → Half3126+5#18315#18310
Half → 25K17380+93#18310#18217
25K → 30K28093+187#18217#18030
30K → 20M9887+11#18030#18019
20M → 21M92920#18019#18019
21M → 35K30109-79#18019#18098
35K → 23M50135-85#18098#18183
23M → 24M25149-124#18183#18307
24M → 40K26131-105#18307#18412
40K → 25.2M1151-40#18412#18452
25.2M → Finish15189-174#18452#18626
TOTALS11782425-1247
📊

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