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BOSTON MARATHON 2023

Karen Mcelroy

Bib: 31270•F

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0:00
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Age Group (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
31:32
Rank: #23816
Start → 5K
31:32 | 10:09/mi
10K· 6.21 mi
1:05:55
Rank: #24927 (-1111)
5K → 10K
34:23 | 11:04/mi
15K· 9.32 mi
1:41:55
Rank: #25360 (-433)
10K → 15K
36:00 | 11:35/mi
20K· 12.43 mi
2:21:57
Rank: #25728 (-368)
15K → 20K
40:02 | 12:53/mi
Half· 13.11 mi
2:30:10
Rank: #25737 (-9)
20K → Half
8:13 | 12:03/mi
25K· 15.53 mi
3:03:46
Rank: #25878 (-141)
Half → 25K
33:36 | 13:51/mi
30K· 18.64 mi
3:49:37
Rank: #26031 (-153)
25K → 30K
45:51 | 14:45/mi
20M
4:14:23
Rank: #26191 (-160)
30K → 20M
24:46 | 18:14/mi
21M
4:32:14
Rank: #26253 (-62)
20M → 21M
17:51 | 17:51/mi
35K· 21.75 mi
4:42:34
Rank: #26246 (+7)
21M → 35K
10:20 | 13:49/mi
23M
5:07:29
Rank: #26411 (-165)
35K → 23M
24:55 | 19:54/mi
24M
5:24:07
Rank: #26452 (-41)
23M → 24M
16:38 | 16:38/mi
40K· 24.85 mi
5:38:36
Rank: #26482 (-30)
24M → 40K
14:29 | 16:56/mi
25.2M
5:43:53
Rank: #26478 (+4)
40K → 25.2M
5:17 | 15:19/mi
Finish· 26.22 mi
5:56:23
Rank: #26462 (+16)
25.2M → Finish
12:30 | 12:16/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time2:30:10
Pace11:27 /mi
2nd Half
Distance13.11 mi
Time3:26:13
Pace15:44 /mi
📊Positive Split: 37.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0431:3210:0931:32
10:09
-
10K
6.21 mi12:24:271:05:5510:3634:23
11:04
+0:55
15K
9.32 mi13:00:271:41:5510:5636:00
11:35
+0:31
20K
12.43 mi13:40:292:21:5711:2540:02
12:53
+1:18
Half
13.11 mi13:48:422:30:1011:278:13
12:03
-0:50
25K
15.53 mi14:22:183:03:4611:5033:36
13:51
+1:48
30K
18.64 mi15:08:093:49:3712:1945:51
14:45
+0:54
20M
20.00 mi15:32:554:14:2312:4324:46
18:14
+3:29
21M
21.00 mi15:50:464:32:1412:5817:51
17:51
-0:23
35K
21.75 mi16:01:064:42:3413:0010:20
13:49
-4:02
23M
23.00 mi16:26:015:07:2913:2224:55
19:54
+6:05
24M
24.00 mi16:42:395:24:0713:3016:38
16:38
-3:16
40K
24.85 mi16:57:085:38:3613:3714:29
16:56
+0:18
25.2M
25.20 mi17:02:255:43:5313:395:17
15:19
-1:37
Finish
26.22 mi17:14:555:56:2313:3612:30
12:16
-3:03

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

10:09 /mi

Average Pace

13:36 /mi

Slowest Pace

19:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:02:38

34% of race

Time at Steady Pace

2:09:49

36% of race

Time at Slower Pace

1:43:56

29% of race

Average Pace: 13:36 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:50:0431:3210:0931:32
10:09
#23816
10K
6.21 mi12:24:271:05:5510:3634:23
11:04
#24927
15K
9.32 mi13:00:271:41:5510:5636:00
11:35
#25360
20K
12.43 mi13:40:292:21:5711:2540:02
12:53
#25728
Half
13.11 mi13:48:422:30:1011:278:13
12:03
#25737
25K
15.53 mi14:22:183:03:4611:5033:36
13:51
#25878
30K
18.64 mi15:08:093:49:3712:1945:51
14:45
#26031
20M
20.00 mi15:32:554:14:2312:4324:46
18:14
#26191
21M
21.00 mi15:50:464:32:1412:5817:51
17:51
#26253
35K
21.75 mi16:01:064:42:3413:0010:20
13:49
#26246
23M
23.00 mi16:26:015:07:2913:2224:55
19:54
#26411
24M
24.00 mi16:42:395:24:0713:3016:38
16:38
#26452
40K
24.85 mi16:57:085:38:3613:3714:29
16:56
#26482
25.2M
25.20 mi17:02:255:43:5313:395:17
15:19
#26478
Finish
26.22 mi17:14:555:56:2313:3612:30
12:16
#26462
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi238169802980225788(Top 97%)10913(Top 96%)10913(Top 223%)
10K6.21 mi3.10 mi24927-111110395-59310395-59325538(Top 96%)10761(Top 94%)10761(Top 220%)
15K9.32 mi3.11 mi25360-43310649-25410649-25425788(Top 97%)10913(Top 96%)10913(Top 223%)
20K12.43 mi3.11 mi25728-36810889-24010889-24026182(Top 98%)11164(Top 98%)11164(Top 229%)
Half13.11 mi0.68 mi25737-910895-610895-625920(Top 97%)11017(Top 96%)11017(Top 226%)
25K15.53 mi2.42 mi25878-14110976-8110976-8126284(Top 99%)11236(Top 98%)11236(Top 230%)
30K18.64 mi3.11 mi26031-15311073-9711073-9726346(Top 99%)11280(Top 99%)11280(Top 231%)
20M20.00 mi1.36 mi26191-16011169-9611169-9626589(Top 100%)11408(Top 100%)11408(Top 234%)
21M21.00 mi1.00 mi26253-6211209-4011209-4026539(Top 100%)11382(Top 100%)11382(Top 233%)
35K21.75 mi0.75 mi26246+711210-111210-126061(Top 98%)11164(Top 98%)11164(Top 229%)
23M23.00 mi1.25 mi26411-16511301-9111301-9126609(Top 100%)11419(Top 100%)11419(Top 234%)
24M24.00 mi1.00 mi26452-4111327-2611327-2626561(Top 100%)11400(Top 100%)11400(Top 233%)
40K24.85 mi0.85 mi26482-3011347-2011347-2026528(Top 100%)11389(Top 100%)11389(Top 233%)
25.2M25.20 mi0.35 mi26478+411345+211345+225856(Top 97%)11104(Top 97%)11104(Top 227%)
Finish26.22 mi1.02 mi26462+1611336+911336+925488(Top 96%)10914(Top 96%)10914(Top 223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21stories
+97ft-345ft

Overall

25788

Females

10913

F18-39

10913

5K→10K

3.1 - 6.2 mi

Top 96%
×5stories
+79ft-138ft

Overall

25538

Females

10761

F18-39

10761

10K→15K

6.2 - 9.3 mi

Top 97%
×3stories
+67ft-78ft

Overall

25788

Females

10913

F18-39

10913

15K→20K

9.3 - 12.4 mi

Top 98%
×5stories
+106ft-86ft

Overall

26182

Females

11164

F18-39

11164

20K→Half

12.4 - 13.1 mi

Top 97%
×2stories
+19ft-37ft

Overall

25920

Females

11017

F18-39

11017

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26284

Females

11236

F18-39

11236

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

26346

Females

11280

F18-39

11280

30K→20M

18.6 - 20.0 mi

Top 100%
×5stories
+64ft-50ft

Overall

26589

Females

11408

F18-39

11408

20M→21M

20.0 - 21.0 mi

Top 100%
×8stories
+106ft-24ft

Overall

26539

Females

11382

F18-39

11382

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

26061

Females

11164

F18-39

11164

35K→23M

21.8 - 23.0 mi

Top 100%
×5stories
+23ft-63ft

Overall

26609

Females

11419

F18-39

11419

23M→24M

23.0 - 24.0 mi

Top 100%
×6stories
+12ft-82ft

Overall

26561

Females

11400

F18-39

11400

24M→40K

24.0 - 24.9 mi

Top 100%
×1story
+6ft-20ft

Overall

26528

Females

11389

F18-39

11389

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

25856

Females

11104

F18-39

11104

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2stories
+22ft-21ft

Overall

25488

Females

10914

F18-39

10914

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
116
Passed By
2762
Net Change
-2646
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23816
5K → 10K51116-1111#23816#24927
10K → 15K15448-433#24927#25360
15K → 20K17385-368#25360#25728
20K → Half716-9#25728#25737
Half → 25K17158-141#25737#25878
25K → 30K12165-153#25878#26031
30K → 20M1161-160#26031#26191
20M → 21M062-62#26191#26253
21M → 35K1811+7#26253#26246
35K → 23M0165-165#26246#26411
23M → 24M041-41#26411#26452
24M → 40K232-30#26452#26482
40K → 25.2M62+4#26482#26478
25.2M → Finish160+16#26478#26462
TOTALS1162762-2646
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing