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BOSTON MARATHON 2023

Cynthia Amstein

Bib: 19086•F

TX

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0:00
0:00
/ mi
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Overall
#0 / 26622
Top 47%
Gender (Female)
#0 / 11423
Top 30%
Age Group (F18-39)
#0 / 4884
Top 48%
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
24:56
Rank: #14196
Start → 5K
24:56 | 8:02/mi
10K· 6.21 mi
49:52
Rank: #14560 (-364)
5K → 10K
24:56 | 8:02/mi
15K· 9.32 mi
1:14:42
Rank: #14456 (+104)
10K → 15K
24:50 | 8:00/mi
20K· 12.43 mi
1:39:24
Rank: #14096 (+360)
15K → 20K
24:42 | 7:57/mi
Half· 13.11 mi
1:44:45
Rank: #14040 (+56)
20K → Half
5:21 | 7:50/mi
25K· 15.53 mi
2:04:15
Rank: #13857 (+183)
Half → 25K
19:30 | 8:03/mi
30K· 18.64 mi
2:29:45
Rank: #13546 (+311)
25K → 30K
25:30 | 8:12/mi
20M
2:40:54
Rank: #13379 (+167)
30K → 20M
11:09 | 8:12/mi
21M
2:49:29
Rank: #13210 (+169)
20M → 21M
8:35 | 8:35/mi
35K· 21.75 mi
2:55:17
Rank: #13090 (+120)
21M → 35K
5:48 | 7:45/mi
23M
3:05:34
Rank: #12954 (+136)
35K → 23M
10:17 | 8:13/mi
24M
3:13:22
Rank: #12818 (+136)
23M → 24M
7:48 | 7:48/mi
40K· 24.85 mi
3:20:13
Rank: #12704 (+114)
24M → 40K
6:51 | 8:01/mi
25.2M
3:23:10
Rank: #12663 (+41)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:31:02
Rank: #12550 (+113)
25.2M → Finish
7:52 | 7:43/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
Time1:44:45
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:46:17
Pace8:06 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1624:568:0224:56
8:02
-
10K
6.21 mi11:41:1249:528:0224:56
8:02
0:00
15K
9.32 mi12:06:021:14:428:0124:50
8:00
-0:02
20K
12.43 mi12:30:441:39:248:0024:42
7:57
-0:03
Half
13.11 mi12:36:051:44:457:595:21
7:50
-0:07
25K
15.53 mi12:55:352:04:158:0019:30
8:03
+0:13
30K
18.64 mi13:21:052:29:458:0225:30
8:12
+0:09
20M
20.00 mi13:32:142:40:548:0311:09
8:12
0:00
21M
21.00 mi13:40:492:49:298:048:35
8:35
+0:23
35K
21.75 mi13:46:372:55:178:045:48
7:45
-0:50
23M
23.00 mi13:56:543:05:348:0410:17
8:13
+0:28
24M
24.00 mi14:04:423:13:228:037:48
7:48
-0:25
40K
24.85 mi14:11:333:20:138:036:51
8:01
+0:13
25.2M
25.20 mi14:14:303:23:108:042:57
8:33
+0:32
Finish
26.22 mi14:22:223:31:028:037:52
7:43
-0:50

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

7:43 /mi

Average Pace

8:03 /mi

Slowest Pace

8:35 /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

3:19:30

95% of race

Time at Steady Pace

11:32

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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 mi11:16:1624:568:0224:56
8:02
#14196
10K
6.21 mi11:41:1249:528:0224:56
8:02
#14560
15K
9.32 mi12:06:021:14:428:0124:50
8:00
#14456
20K
12.43 mi12:30:441:39:248:0024:42
7:57
#14096
Half
13.11 mi12:36:051:44:457:595:21
7:50
#14040
25K
15.53 mi12:55:352:04:158:0019:30
8:03
#13857
30K
18.64 mi13:21:052:29:458:0225:30
8:12
#13546
20M
20.00 mi13:32:142:40:548:0311:09
8:12
#13379
21M
21.00 mi13:40:492:49:298:048:35
8:35
#13210
35K
21.75 mi13:46:372:55:178:045:48
7:45
#13090
23M
23.00 mi13:56:543:05:348:0410:17
8:13
#12954
24M
24.00 mi14:04:423:13:228:037:48
7:48
#12818
40K
24.85 mi14:11:333:20:138:036:51
8:01
#12704
25.2M
25.20 mi14:14:303:23:108:042:57
8:33
#12663
Finish
26.22 mi14:22:223:31:028:037:52
7:43
#12550
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 mi141964144414414336(Top 54%)4281(Top 37%)4281(Top 88%)
10K6.21 mi3.10 mi14560-3644379-2354379-23514990(Top 56%)4663(Top 41%)4663(Top 95%)
15K9.32 mi3.11 mi14456+1044330+494330+4914336(Top 54%)4281(Top 37%)4281(Top 88%)
20K12.43 mi3.11 mi14096+3604143+1874143+18713041(Top 49%)3572(Top 31%)3572(Top 73%)
Half13.11 mi0.68 mi14040+564107+364107+3613152(Top 49%)3586(Top 31%)3586(Top 73%)
25K15.53 mi2.42 mi13857+1834027+804027+8013098(Top 49%)3682(Top 32%)3682(Top 75%)
30K18.64 mi3.11 mi13546+3113868+1593868+15912400(Top 47%)3412(Top 30%)3412(Top 70%)
20M20.00 mi1.36 mi13379+1673786+823786+8211757(Top 44%)3142(Top 28%)3142(Top 64%)
21M21.00 mi1.00 mi13210+1693695+913695+9111000(Top 41%)2873(Top 25%)2873(Top 59%)
35K21.75 mi0.75 mi13090+1203648+473648+4710377(Top 39%)2566(Top 22%)2566(Top 53%)
23M23.00 mi1.25 mi12954+1363603+453603+4511302(Top 42%)3163(Top 28%)3163(Top 65%)
24M24.00 mi1.00 mi12818+1363545+583545+589845(Top 37%)2530(Top 22%)2530(Top 52%)
40K24.85 mi0.85 mi12704+1143493+523493+5210180(Top 38%)2752(Top 24%)2752(Top 56%)
25.2M25.20 mi0.35 mi12663+413479+143479+149977(Top 37%)2693(Top 24%)2693(Top 55%)
Finish26.22 mi1.02 mi12550+1133440+393440+3910139(Top 38%)2770(Top 24%)2770(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

14336

Females

4281

F18-39

4281

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

14990

Females

4663

F18-39

4663

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

14336

Females

4281

F18-39

4281

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13041

Females

3572

F18-39

3572

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13152

Females

3586

F18-39

3586

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

13098

Females

3682

F18-39

3682

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

12400

Females

3412

F18-39

3412

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11757

Females

3142

F18-39

3142

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11000

Females

2873

F18-39

2873

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10377

Females

2566

F18-39

2566

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11302

Females

3163

F18-39

3163

23M→24M

23.0 - 24.0 mi

Top 37%
×6stories
+12ft-82ft

Overall

9845

Females

2530

F18-39

2530

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10180

Females

2752

F18-39

2752

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9977

Females

2693

F18-39

2693

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10139

Females

2770

F18-39

2770

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2567
Passed By
921
Net Change
+1646
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14196
5K → 10K146510-364#14196#14560
10K → 15K236132+104#14560#14456
15K → 20K40242+360#14456#14096
20K → Half6812+56#14096#14040
Half → 25K23249+183#14040#13857
25K → 30K35847+311#13857#13546
30K → 20M18518+167#13546#13379
20M → 21M18819+169#13379#13210
21M → 35K13010+120#13210#13090
35K → 23M16125+136#13090#12954
23M → 24M15418+136#12954#12818
24M → 40K12511+114#12818#12704
40K → 25.2M476+41#12704#12663
25.2M → Finish13522+113#12663#12550
TOTALS2567921+1646
📊

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