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BOSTON MARATHON 2023

Emily Margolis

Bib: 19313•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 (F40-44)
#0 / 1878
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
8:08/mi
25:16
↑ 97↓ 3451.5%
10K· 6.21 mi
7:54/mi
49:48
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:14:47
↑ 67↓ 78
20K· 12.43 mi
8:12/mi
1:40:17
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:45:54
↑ 19↓ 370.5%
25K· 15.53 mi
8:41/mi
2:06:57
↑ 66↓ 880.2%
30K· 18.64 mi
9:16/mi
2:35:45
↑ 181↓ 1480.2%
20M
9:40/mi
2:48:53
↑ 64↓ 500.2%
21M
10:57/mi
2:59:50
↑ 106↓ 241.6%
35K· 21.75 mi
10:03/mi
3:07:21
↑ 17↓ 861.7%
23M
10:11/mi
3:20:06
↑ 23↓ 630.6%
24M
9:49/mi
3:29:55
↓ 821.3%
40K· 24.85 mi
10:02/mi
3:38:30
↓ 200.3%
25.2M
10:55/mi
3:42:16
↑ 13↓ 160.2%
Finish· 26.22 mi
10:08/mi
3:52:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:54
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time2:06:42
Pace9:40 /mi
📊Positive Split: 19.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:5725:168:0825:16
8:08
-
10K
6.21 mi11:41:2949:488:0124:32
7:54
-0:14
15K
9.32 mi12:06:281:14:478:0124:59
8:02
+0:08
20K
12.43 mi12:31:581:40:178:0425:30
8:12
+0:10
Half
13.11 mi12:37:351:45:548:055:37
8:14
+0:02
25K
15.53 mi12:58:382:06:578:1021:03
8:41
+0:27
30K
18.64 mi13:27:262:35:458:2128:48
9:16
+0:35
20M
20.00 mi13:40:342:48:538:2713:08
9:40
+0:24
21M
21.00 mi13:51:312:59:508:3410:57
10:57
+1:17
35K
21.75 mi13:59:023:07:218:377:31
10:03
-0:54
23M
23.00 mi14:11:473:20:068:4212:45
10:11
+0:08
24M
24.00 mi14:21:363:29:558:459:49
9:49
-0:22
40K
24.85 mi14:30:113:38:308:478:35
10:02
+0:13
25.2M
25.20 mi14:33:573:42:168:493:46
10:55
+0:53
Finish
26.22 mi14:44:173:52:368:5310:20
10:08
-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

7:54 /mi

Average Pace

8:53 /mi

Slowest Pace

10:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:57

55% of race

Time at Steady Pace

1:18:11

34% of race

Time at Slower Pace

27:28

12% of race

Average Pace: 8:52 /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 mi11:16:5725:168:0825:16
8:08
#14972
10K
6.21 mi11:41:2949:488:0124:32
7:54
#14495
15K
9.32 mi12:06:281:14:478:0124:59
8:02
#14525
20K
12.43 mi12:31:581:40:178:0425:30
8:12
#14656
Half
13.11 mi12:37:351:45:548:055:37
8:14
#14725
25K
15.53 mi12:58:382:06:578:1021:03
8:41
#15154
30K
18.64 mi13:27:262:35:458:2128:48
9:16
#15843
20M
20.00 mi13:40:342:48:538:2713:08
9:40
#16185
21M
21.00 mi13:51:312:59:508:3410:57
10:57
#16572
35K
21.75 mi13:59:023:07:218:377:31
10:03
#16852
23M
23.00 mi14:11:473:20:068:4212:45
10:11
#17174
24M
24.00 mi14:21:363:29:558:459:49
9:49
#17380
40K
24.85 mi14:30:113:38:308:478:35
10:02
#17565
25.2M
25.20 mi14:33:573:42:168:493:46
10:55
#17645
Finish
26.22 mi14:44:173:52:368:5310:20
10:08
#17905
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi149724625462514753(Top 55%)4542(Top 40%)4542(Top 242%)
10K6.21 mi3.10 mi14495+4774340+2854340+28513983(Top 53%)4039(Top 35%)4039(Top 215%)
15K9.32 mi3.11 mi14525-304367-274367-2714753(Top 55%)4542(Top 40%)4542(Top 242%)
20K12.43 mi3.11 mi14656-1314466-994466-9915032(Top 56%)4741(Top 42%)4741(Top 252%)
Half13.11 mi0.68 mi14725-694512-464512-4616117(Top 61%)5385(Top 47%)5385(Top 287%)
25K15.53 mi2.42 mi15154-4294806-2944806-29417300(Top 65%)6173(Top 54%)6173(Top 329%)
30K18.64 mi3.11 mi15843-6895279-4735279-47318485(Top 69%)6909(Top 60%)6909(Top 368%)
20M20.00 mi1.36 mi16185-3425509-2305509-23019453(Top 73%)7544(Top 66%)7544(Top 402%)
21M21.00 mi1.00 mi16572-3875749-2405749-24020723(Top 78%)8305(Top 73%)8305(Top 442%)
35K21.75 mi0.75 mi16852-2805907-1585907-15821408(Top 80%)8712(Top 76%)8712(Top 464%)
23M23.00 mi1.25 mi17174-3226118-2116118-21120520(Top 77%)8242(Top 72%)8242(Top 439%)
24M24.00 mi1.00 mi17380-2066258-1406258-14020285(Top 76%)8138(Top 71%)8138(Top 433%)
40K24.85 mi0.85 mi17565-1856382-1246382-12420083(Top 75%)8101(Top 71%)8101(Top 431%)
25.2M25.20 mi0.35 mi17645-806433-516433-5120286(Top 76%)8199(Top 72%)8199(Top 437%)
Finish26.22 mi1.02 mi17905-2606596-1636596-16322131(Top 83%)9181(Top 80%)9181(Top 489%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14753

Females

4542

F40-44

4542

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

13983

Females

4039

F40-44

4039

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14753

Females

4542

F40-44

4542

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15032

Females

4741

F40-44

4741

20K→Half

12.4 - 13.1 mi

Top 61%
×2story building
+19ft-37ft

Overall

16117

Females

5385

F40-44

5385

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17300

Females

6173

F40-44

6173

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

18485

Females

6909

F40-44

6909

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

19453

Females

7544

F40-44

7544

20M→21M

20.0 - 21.0 mi

Top 78%
×8story building
+106ft-24ft

Overall

20723

Females

8305

F40-44

8305

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

21408

Females

8712

F40-44

8712

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20520

Females

8242

F40-44

8242

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

20285

Females

8138

F40-44

8138

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

20083

Females

8101

F40-44

8101

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

20286

Females

8199

F40-44

8199

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22131

Females

9181

F40-44

9181

Passing Analysis

Category:
Athletes Passed
1152
Passed By
4085
Net Change
-2933
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14972
5K → 10K595118+477#14972#14495
10K → 15K181211-30#14495#14525
15K → 20K136267-131#14525#14656
20K → Half1079-69#14656#14725
Half → 25K55484-429#14725#15154
25K → 30K38727-689#15154#15843
30K → 20M29371-342#15843#16185
20M → 21M21408-387#16185#16572
21M → 35K8288-280#16572#16852
35K → 23M22344-322#16852#17174
23M → 24M23229-206#17174#17380
24M → 40K18203-185#17380#17565
40K → 25.2M1191-80#17565#17645
25.2M → Finish5265-260#17645#17905
TOTALS11524085-2933
📊

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