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BOSTON MARATHON 2023

Katherine Bernstein

Bib: 27421•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
8:30/mi
26:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:13/mi
51:58
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:17:58
↑ 67↓ 78
20K· 12.43 mi
8:53/mi
1:45:34
↑ 106↓ 860.1%
Half· 13.11 mi
8:30/mi
1:51:22
↑ 19↓ 370.5%
25K· 15.53 mi
10:02/mi
2:15:41
↑ 66↓ 880.2%
30K· 18.64 mi
10:25/mi
2:48:04
↑ 181↓ 1480.2%
20M
10:25/mi
3:02:14
↑ 64↓ 500.2%
21M
11:49/mi
3:14:03
↑ 106↓ 241.6%
35K· 21.75 mi
10:31/mi
3:21:55
↑ 17↓ 861.7%
23M
11:01/mi
3:35:42
↑ 23↓ 630.6%
24M
10:21/mi
3:46:03
↓ 821.3%
40K· 24.85 mi
11:10/mi
3:55:36
↓ 200.3%
25.2M
10:47/mi
3:59:19
↑ 13↓ 160.2%
Finish· 26.22 mi
9:34/mi
4:09:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:22
Pace8:30 /mi
2nd Half
Distance13.11 mi
Time2:17:42
Pace10:30 /mi
📊Positive Split: 23.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:4226:258:3026:25
8:30
-
10K
6.21 mi12:09:1551:588:2225:33
8:13
-0:17
15K
9.32 mi12:35:151:17:588:2226:00
8:22
+0:09
20K
12.43 mi13:02:511:45:348:3027:36
8:53
+0:31
Half
13.11 mi13:08:391:51:228:305:48
8:30
-0:23
25K
15.53 mi13:32:582:15:418:4424:19
10:02
+1:32
30K
18.64 mi14:05:212:48:049:0132:23
10:25
+0:23
20M
20.00 mi14:19:313:02:149:0714:10
10:25
0:00
21M
21.00 mi14:31:203:14:039:1411:49
11:49
+1:24
35K
21.75 mi14:39:123:21:559:177:52
10:31
-1:18
23M
23.00 mi14:52:593:35:429:2313:47
11:01
+0:30
24M
24.00 mi15:03:203:46:039:2510:21
10:21
-0:40
40K
24.85 mi15:12:533:55:369:299:33
11:10
+0:49
25.2M
25.20 mi15:16:363:59:199:303:43
10:47
-0:23
Finish
26.22 mi15:26:214:09:049:309:45
9:34
-1:13

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

8:13 /mi

Average Pace

9:30 /mi

Slowest Pace

11:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:07

49% of race

Time at Steady Pace

1:32:48

37% of race

Time at Slower Pace

35:09

14% of race

Average Pace: 9:30 /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 mi11:43:4226:258:3026:25
8:30
#17590
10K
6.21 mi12:09:1551:588:2225:33
8:13
#16954
15K
9.32 mi12:35:151:17:588:2226:00
8:22
#16953
20K
12.43 mi13:02:511:45:348:3027:36
8:53
#17528
Half
13.11 mi13:08:391:51:228:305:48
8:30
#17537
25K
15.53 mi13:32:582:15:418:4424:19
10:02
#18772
30K
18.64 mi14:05:212:48:049:0132:23
10:25
#19664
20M
20.00 mi14:19:313:02:149:0714:10
10:25
#19867
21M
21.00 mi14:31:203:14:039:1411:49
11:49
#20125
35K
21.75 mi14:39:123:21:559:177:52
10:31
#20238
23M
23.00 mi14:52:593:35:429:2313:47
11:01
#20398
24M
24.00 mi15:03:203:46:039:2510:21
10:21
#20459
40K
24.85 mi15:12:533:55:369:299:33
11:10
#20575
25.2M
25.20 mi15:16:363:59:199:303:43
10:47
#20556
Finish
26.22 mi15:26:214:09:049:309:45
9:34
#20551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi175906312631216980(Top 64%)5901(Top 52%)5901(Top 121%)
10K6.21 mi3.10 mi16954+6365888+4245888+42416442(Top 62%)5541(Top 49%)5541(Top 113%)
15K9.32 mi3.11 mi16953+15881+75881+716980(Top 64%)5901(Top 52%)5901(Top 121%)
20K12.43 mi3.11 mi17528-5756236-3556236-35519147(Top 72%)7182(Top 63%)7182(Top 147%)
Half13.11 mi0.68 mi17537-96243-76243-717791(Top 67%)6369(Top 56%)6369(Top 130%)
25K15.53 mi2.42 mi18772-12356994-7516994-75122275(Top 84%)8983(Top 79%)8983(Top 184%)
30K18.64 mi3.11 mi19664-8927529-5357529-53522055(Top 83%)8938(Top 78%)8938(Top 183%)
20M20.00 mi1.36 mi19867-2037665-1367665-13621567(Top 81%)8735(Top 76%)8735(Top 179%)
21M21.00 mi1.00 mi20125-2587823-1587823-15822451(Top 84%)9249(Top 81%)9249(Top 189%)
35K21.75 mi0.75 mi20238-1137898-757898-7522426(Top 84%)9280(Top 81%)9280(Top 190%)
23M23.00 mi1.25 mi20398-1607995-977995-9722365(Top 84%)9248(Top 81%)9248(Top 189%)
24M24.00 mi1.00 mi20459-618043-488043-4821671(Top 81%)8925(Top 78%)8925(Top 183%)
40K24.85 mi0.85 mi20575-1168119-768119-7622686(Top 85%)9492(Top 83%)9492(Top 194%)
25.2M25.20 mi0.35 mi20556+198107+128107+1219947(Top 75%)8036(Top 70%)8036(Top 165%)
Finish26.22 mi1.02 mi20551+58114-78114-720369(Top 77%)8226(Top 72%)8226(Top 168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16980

Females

5901

F18-39

5901

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

16442

Females

5541

F18-39

5541

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16980

Females

5901

F18-39

5901

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

19147

Females

7182

F18-39

7182

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17791

Females

6369

F18-39

6369

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22275

Females

8983

F18-39

8983

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

22055

Females

8938

F18-39

8938

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21567

Females

8735

F18-39

8735

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

22451

Females

9249

F18-39

9249

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

22426

Females

9280

F18-39

9280

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22365

Females

9248

F18-39

9248

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21671

Females

8925

F18-39

8925

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22686

Females

9492

F18-39

9492

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

19947

Females

8036

F18-39

8036

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

20369

Females

8226

F18-39

8226

Passing Analysis

Category:
Athletes Passed
1333
Passed By
4294
Net Change
-2961
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17590
5K → 10K760124+636#17590#16954
10K → 15K207206+1#16954#16953
15K → 20K61636-575#16953#17528
20K → Half3746-9#17528#17537
Half → 25K91244-1235#17537#18772
25K → 30K29921-892#18772#19664
30K → 20M38241-203#19664#19867
20M → 21M24282-258#19867#20125
21M → 35K19132-113#20125#20238
35K → 23M29189-160#20238#20398
23M → 24M2687-61#20398#20459
24M → 40K15131-116#20459#20575
40K → 25.2M3213+19#20575#20556
25.2M → Finish4742+5#20556#20551
TOTALS13334294-2961
📊

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