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BOSTON MARATHON 2023

Stephanie Amack

Bib: 10000•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 21%
Gender (Female)
#0 / 11423
Top 5%
Division (F18-39)
#0 / 4884
Top 9%
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
6:44/mi
20:56
↑ 97↓ 3451.5%
10K· 6.21 mi
6:37/mi
41:28
↑ 79↓ 1380.4%
15K· 9.32 mi
6:40/mi
1:02:11
↑ 67↓ 78
20K· 12.43 mi
6:50/mi
1:23:25
↑ 106↓ 860.1%
Half· 13.11 mi
6:45/mi
1:28:01
↑ 19↓ 370.5%
25K· 15.53 mi
6:54/mi
1:44:44
↑ 66↓ 880.2%
30K· 18.64 mi
7:15/mi
2:07:17
↑ 181↓ 1480.2%
20M
7:26/mi
2:17:23
↑ 64↓ 500.2%
21M
8:06/mi
2:25:29
↑ 106↓ 241.6%
35K· 21.75 mi
7:02/mi
2:30:45
↑ 17↓ 861.7%
23M
7:40/mi
2:40:21
↑ 23↓ 630.6%
24M
7:45/mi
2:48:06
↓ 821.3%
40K· 24.85 mi
7:56/mi
2:54:53
↓ 200.3%
25.2M
8:56/mi
2:57:58
↑ 13↓ 160.2%
Finish· 26.22 mi
8:34/mi
3:06:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:01
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:38:41
Pace7:32 /mi
📊Positive Split: 12.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:0720:566:4420:56
6:44
-
10K
6.21 mi11:07:3941:286:4020:32
6:37
-0:07
15K
9.32 mi11:28:221:02:116:4020:43
6:40
+0:03
20K
12.43 mi11:49:361:23:256:4321:14
6:50
+0:10
Half
13.11 mi11:54:121:28:016:434:36
6:45
-0:05
25K
15.53 mi12:10:551:44:446:4516:43
6:54
+0:09
30K
18.64 mi12:33:282:07:176:5022:33
7:15
+0:21
20M
20.00 mi12:43:342:17:236:5210:06
7:26
+0:11
21M
21.00 mi12:51:402:25:296:568:06
8:06
+0:40
35K
21.75 mi12:56:562:30:456:565:16
7:02
-1:04
23M
23.00 mi13:06:322:40:216:589:36
7:40
+0:38
24M
24.00 mi13:14:172:48:067:007:45
7:45
+0:05
40K
24.85 mi13:21:042:54:537:026:47
7:56
+0:11
25.2M
25.20 mi13:24:092:57:587:043:05
8:56
+1:00
Finish
26.22 mi13:32:533:06:427:088:44
8:34
-0:22

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

6:37 /mi

Average Pace

7:08 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:01

47% of race

Time at Steady Pace

54:38

29% of race

Time at Slower Pace

44:03

24% of race

Average Pace: 7:07 /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 mi10:47:0720:566:4420:56
6:44
#4036
10K
6.21 mi11:07:3941:286:4020:32
6:37
#3738
15K
9.32 mi11:28:221:02:116:4020:43
6:40
#3740
20K
12.43 mi11:49:361:23:256:4321:14
6:50
#3993
Half
13.11 mi11:54:121:28:016:434:36
6:45
#4024
25K
15.53 mi12:10:551:44:446:4516:43
6:54
#4153
30K
18.64 mi12:33:282:07:176:5022:33
7:15
#4560
20M
20.00 mi12:43:342:17:236:5210:06
7:26
#4754
21M
21.00 mi12:51:402:25:296:568:06
8:06
#4943
35K
21.75 mi12:56:562:30:456:565:16
7:02
#4951
23M
23.00 mi13:06:322:40:216:589:36
7:40
#5060
24M
24.00 mi13:14:172:48:067:007:45
7:45
#5171
40K
24.85 mi13:21:042:54:537:026:47
7:56
#5261
25.2M
25.20 mi13:24:092:57:587:043:05
8:56
#5332
Finish
26.22 mi13:32:533:06:427:088:44
8:34
#5631
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi40362462463849(Top 14%)227(Top 2%)227(Top 5%)
10K6.21 mi3.10 mi3738+298210+36210+363580(Top 13%)197(Top 2%)197(Top 4%)
15K9.32 mi3.11 mi3740-2207+3207+33849(Top 14%)227(Top 2%)227(Top 5%)
20K12.43 mi3.11 mi3993-253232-25232-254782(Top 18%)337(Top 3%)337(Top 7%)
Half13.11 mi0.68 mi4024-31239-7239-74864(Top 18%)358(Top 3%)358(Top 7%)
25K15.53 mi2.42 mi4153-129255-16255-164947(Top 19%)367(Top 3%)367(Top 8%)
30K18.64 mi3.11 mi4560-407301-46301-465821(Top 22%)578(Top 5%)578(Top 12%)
20M20.00 mi1.36 mi4754-194326-25326-256373(Top 24%)803(Top 7%)803(Top 16%)
21M21.00 mi1.00 mi4943-189357-31357-318021(Top 30%)1519(Top 13%)1519(Top 31%)
35K21.75 mi0.75 mi4951-8365-8365-85589(Top 21%)639(Top 6%)639(Top 13%)
23M23.00 mi1.25 mi5060-109398-33398-337556(Top 28%)1389(Top 12%)1389(Top 28%)
24M24.00 mi1.00 mi5171-111418-20418-209432(Top 35%)2293(Top 20%)2293(Top 47%)
40K24.85 mi0.85 mi5261-90438-20438-209598(Top 36%)2443(Top 21%)2443(Top 50%)
25.2M25.20 mi0.35 mi5332-71459-21459-2112180(Top 46%)3793(Top 33%)3793(Top 78%)
Finish26.22 mi1.02 mi5631-299529-70529-7015820(Top 59%)5699(Top 50%)5699(Top 117%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21story building
+97ft-345ft

Overall

3849

Females

227

F18-39

227

5K→10K

3.1 - 6.2 mi

Top 13%
×5story building
+79ft-138ft

Overall

3580

Females

197

F18-39

197

10K→15K

6.2 - 9.3 mi

Top 14%
×3story building
+67ft-78ft

Overall

3849

Females

227

F18-39

227

15K→20K

9.3 - 12.4 mi

Top 18%
×5story building
+106ft-86ft

Overall

4782

Females

337

F18-39

337

20K→Half

12.4 - 13.1 mi

Top 18%
×2story building
+19ft-37ft

Overall

4864

Females

358

F18-39

358

Half→25K

13.1 - 15.5 mi

Top 19%
×4story building
+66ft-88ft

Overall

4947

Females

367

F18-39

367

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

5821

Females

578

F18-39

578

30K→20M

18.6 - 20.0 mi

Top 24%
×5story building
+64ft-50ft

Overall

6373

Females

803

F18-39

803

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

8021

Females

1519

F18-39

1519

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5589

Females

639

F18-39

639

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

7556

Females

1389

F18-39

1389

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9432

Females

2293

F18-39

2293

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9598

Females

2443

F18-39

2443

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12180

Females

3793

F18-39

3793

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

15820

Females

5699

F18-39

5699

Passing Analysis

Category:
Athletes Passed
831
Passed By
2426
Net Change
-1595
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4036
5K → 10K401103+298#4036#3738
10K → 15K112114-2#3738#3740
15K → 20K46299-253#3740#3993
20K → Half1142-31#3993#4024
Half → 25K42171-129#4024#4153
25K → 30K39446-407#4153#4560
30K → 20M29223-194#4560#4754
20M → 21M16205-189#4754#4943
21M → 35K3139-8#4943#4951
35K → 23M41150-109#4951#5060
23M → 24M26137-111#5060#5171
24M → 40K21111-90#5171#5261
40K → 25.2M576-71#5261#5332
25.2M → Finish11310-299#5332#5631
TOTALS8312426-1595
📊

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