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BOSTON MARATHON 2023

Margaret Shields

Bib: 15534•F

DC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 46%
Gender (Female)
#0 / 11423
Top 28%
Division (F18-39)
#0 / 4884
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:20
Rank: #12683
Start → 5K
24:20 | 7:50/mi
10K· 6.21 mi
48:44
Rank: #13127 (-444)
5K → 10K
24:24 | 7:51/mi
15K· 9.32 mi
1:13:17
Rank: #13252 (-125)
10K → 15K
24:33 | 7:54/mi
20K· 12.43 mi
1:38:05
Rank: #13257 (-5)
15K → 20K
24:48 | 7:59/mi
Half· 13.11 mi
1:43:23
Rank: #13201 (+56)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
2:02:49
Rank: #13099 (+102)
Half → 25K
19:26 | 8:01/mi
30K· 18.64 mi
2:28:42
Rank: #13114 (-15)
25K → 30K
25:53 | 8:20/mi
20M
2:39:55
Rank: #13012 (+102)
30K → 20M
11:13 | 8:15/mi
21M
2:48:34
Rank: #12881 (+131)
20M → 21M
8:39 | 8:39/mi
35K· 21.75 mi
2:54:33
Rank: #12832 (+49)
21M → 35K
5:59 | 8:00/mi
23M
3:04:34
Rank: #12626 (+206)
35K → 23M
10:01 | 8:00/mi
24M
3:12:20
Rank: #12476 (+150)
23M → 24M
7:46 | 7:46/mi
40K· 24.85 mi
3:19:04
Rank: #12358 (+118)
24M → 40K
6:44 | 7:53/mi
25.2M
3:22:00
Rank: #12308 (+50)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:29:34
Rank: #12118 (+190)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:23
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:46:11
Pace8:06 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:0224:207:5024:20
7:50
-
10K
6.21 mi11:19:2648:447:5124:24
7:51
+0:01
15K
9.32 mi11:43:591:13:177:5224:33
7:54
+0:03
20K
12.43 mi12:08:471:38:057:5424:48
7:59
+0:05
Half
13.11 mi12:14:051:43:237:535:18
7:46
-0:13
25K
15.53 mi12:33:312:02:497:5419:26
8:01
+0:15
30K
18.64 mi12:59:242:28:427:5925:53
8:20
+0:19
20M
20.00 mi13:10:372:39:558:0011:13
8:15
-0:05
21M
21.00 mi13:19:162:48:348:028:39
8:39
+0:24
35K
21.75 mi13:25:152:54:338:025:59
8:00
-0:39
23M
23.00 mi13:35:163:04:348:0110:01
8:00
0:00
24M
24.00 mi13:43:023:12:208:017:46
7:46
-0:14
40K
24.85 mi13:49:463:19:048:016:44
7:53
+0:07
25.2M
25.20 mi13:52:423:22:008:012:56
8:30
+0:37
Finish
26.22 mi14:00:163:29:348:007:34
7:26
-1:04

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

7:26 /mi

Average Pace

8:00 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:40:53

77% of race

Time at Steady Pace

48:41

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi10:55:0224:207:5024:20
7:50
#12683
10K
6.21 mi11:19:2648:447:5124:24
7:51
#13127
15K
9.32 mi11:43:591:13:177:5224:33
7:54
#13252
20K
12.43 mi12:08:471:38:057:5424:48
7:59
#13257
Half
13.11 mi12:14:051:43:237:535:18
7:46
#13201
25K
15.53 mi12:33:312:02:497:5419:26
8:01
#13099
30K
18.64 mi12:59:242:28:427:5925:53
8:20
#13114
20M
20.00 mi13:10:372:39:558:0011:13
8:15
#13012
21M
21.00 mi13:19:162:48:348:028:39
8:39
#12881
35K
21.75 mi13:25:152:54:338:025:59
8:00
#12832
23M
23.00 mi13:35:163:04:348:0110:01
8:00
#12626
24M
24.00 mi13:43:023:12:208:017:46
7:46
#12476
40K
24.85 mi13:49:463:19:048:016:44
7:53
#12358
25.2M
25.20 mi13:52:423:22:008:012:56
8:30
#12308
Finish
26.22 mi14:00:163:29:348:007:34
7:26
#12118
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi126833270327013565(Top 51%)3812(Top 33%)3812(Top 78%)
10K6.21 mi3.10 mi13127-4443521-2513521-25113601(Top 51%)3790(Top 33%)3790(Top 78%)
15K9.32 mi3.11 mi13252-1253607-863607-8613565(Top 51%)3812(Top 33%)3812(Top 78%)
20K12.43 mi3.11 mi13257-53635-283635-2813281(Top 50%)3695(Top 32%)3695(Top 76%)
Half13.11 mi0.68 mi13201+563606+293606+2912501(Top 47%)3204(Top 28%)3204(Top 66%)
25K15.53 mi2.42 mi13099+1023546+603546+6012874(Top 48%)3557(Top 31%)3557(Top 73%)
30K18.64 mi3.11 mi13114-153620-743620-7413225(Top 50%)3878(Top 34%)3878(Top 79%)
20M20.00 mi1.36 mi13012+1023571+493571+4912061(Top 45%)3309(Top 29%)3309(Top 68%)
21M21.00 mi1.00 mi12881+1313519+523519+5211379(Top 43%)3077(Top 27%)3077(Top 63%)
35K21.75 mi0.75 mi12832+493505+143505+1412137(Top 46%)3500(Top 31%)3500(Top 72%)
23M23.00 mi1.25 mi12626+2063404+1013404+1019781(Top 37%)2408(Top 21%)2408(Top 49%)
24M24.00 mi1.00 mi12476+1503336+683336+689589(Top 36%)2399(Top 21%)2399(Top 49%)
40K24.85 mi0.85 mi12358+1183290+463290+469223(Top 35%)2285(Top 20%)2285(Top 47%)
25.2M25.20 mi0.35 mi12308+503273+173273+179668(Top 36%)2551(Top 22%)2551(Top 52%)
Finish26.22 mi1.02 mi12118+1903190+833190+838015(Top 30%)1845(Top 16%)1845(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13565

Females

3812

F18-39

3812

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

13601

Females

3790

F18-39

3790

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13565

Females

3812

F18-39

3812

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

13281

Females

3695

F18-39

3695

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

12501

Females

3204

F18-39

3204

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

12874

Females

3557

F18-39

3557

25K→30K

15.5 - 18.6 mi

Top 50%
×9stories
+181ft-148ft

Overall

13225

Females

3878

F18-39

3878

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

12061

Females

3309

F18-39

3309

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

11379

Females

3077

F18-39

3077

21M→35K

21.0 - 21.8 mi

Top 46%
×7stories
+17ft-86ft

Overall

12137

Females

3500

F18-39

3500

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

9781

Females

2408

F18-39

2408

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9589

Females

2399

F18-39

2399

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9223

Females

2285

F18-39

2285

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9668

Females

2551

F18-39

2551

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8015

Females

1845

F18-39

1845

Passing Analysis

Category:
Athletes Passed
2075
Passed By
1510
Net Change
+565
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12683
5K → 10K145589-444#12683#13127
10K → 15K156281-125#13127#13252
15K → 20K189194-5#13252#13257
20K → Half648+56#13257#13201
Half → 25K19290+102#13201#13099
25K → 30K181196-15#13099#13114
30K → 20M14644+102#13114#13012
20M → 21M16332+131#13012#12881
21M → 35K7728+49#12881#12832
35K → 23M2137+206#12832#12626
23M → 24M16212+150#12626#12476
24M → 40K13012+118#12476#12358
40K → 25.2M544+50#12358#12308
25.2M → Finish20313+190#12308#12118
TOTALS20751510+565
📊

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