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BOSTON MARATHON 2023

Heather Northrop

Bib: 30550•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
9:27/mi
29:22
↑ 97↓ 3451.5%
10K· 6.21 mi
9:15/mi
58:07
↑ 79↓ 1380.4%
15K· 9.32 mi
9:29/mi
1:27:34
↑ 67↓ 78
20K· 12.43 mi
10:10/mi
1:59:09
↑ 106↓ 860.1%
Half· 13.11 mi
9:55/mi
2:05:55
↑ 19↓ 370.5%
25K· 15.53 mi
10:41/mi
2:31:48
↑ 66↓ 880.2%
30K· 18.64 mi
11:08/mi
3:06:24
↑ 181↓ 1480.2%
20M
11:05/mi
3:21:28
↑ 64↓ 500.2%
21M
12:13/mi
3:33:41
↑ 106↓ 241.6%
35K· 21.75 mi
11:08/mi
3:42:01
↑ 17↓ 861.7%
23M
10:49/mi
3:55:34
↑ 23↓ 630.6%
24M
14:29/mi
4:10:03
↓ 821.3%
40K· 24.85 mi
12:37/mi
4:20:50
↓ 200.3%
25.2M
13:38/mi
4:25:32
↑ 13↓ 160.2%
Finish· 26.22 mi
10:19/mi
4:36:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:55
Pace9:36 /mi
2nd Half
Distance13.11 mi
Time2:30:08
Pace11:27 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1129:229:2729:22
9:27
-
10K
6.21 mi12:14:5658:079:2128:45
9:15
-0:12
15K
9.32 mi12:44:231:27:349:2429:27
9:29
+0:14
20K
12.43 mi13:15:581:59:099:3531:35
10:10
+0:41
Half
13.11 mi13:22:442:05:559:366:46
9:55
-0:15
25K
15.53 mi13:48:372:31:489:4625:53
10:41
+0:46
30K
18.64 mi14:23:133:06:2410:0034:36
11:08
+0:27
20M
20.00 mi14:38:173:21:2810:0415:04
11:05
-0:03
21M
21.00 mi14:50:303:33:4110:1112:13
12:13
+1:08
35K
21.75 mi14:58:503:42:0110:138:20
11:08
-1:05
23M
23.00 mi15:12:233:55:3410:1513:33
10:49
-0:19
24M
24.00 mi15:26:524:10:0310:2514:29
14:29
+3:40
40K
24.85 mi15:37:394:20:5010:3010:47
12:37
-1:52
25.2M
25.20 mi15:42:214:25:3210:324:42
13:38
+1:01
Finish
26.22 mi15:52:524:36:0310:3210:31
10:19
-3:19

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

9:15 /mi

Average Pace

10:32 /mi

Slowest Pace

14:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:20

34% of race

Time at Steady Pace

2:19:32

51% of race

Time at Slower Pace

42:11

15% of race

Average Pace: 10:32 /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 mi11:46:1129:229:2729:22
9:27
#21963
10K
6.21 mi12:14:5658:079:2128:45
9:15
#21896
15K
9.32 mi12:44:231:27:349:2429:27
9:29
#21976
20K
12.43 mi13:15:581:59:099:3531:35
10:10
#22354
Half
13.11 mi13:22:442:05:559:366:46
9:55
#22418
25K
15.53 mi13:48:372:31:489:4625:53
10:41
#22651
30K
18.64 mi14:23:133:06:2410:0034:36
11:08
#22798
20M
20.00 mi14:38:173:21:2810:0415:04
11:05
#22782
21M
21.00 mi14:50:303:33:4110:1112:13
12:13
#22830
35K
21.75 mi14:58:503:42:0110:138:20
11:08
#22864
23M
23.00 mi15:12:233:55:3410:1513:33
10:49
#22800
24M
24.00 mi15:26:524:10:0310:2514:29
14:29
#23130
40K
24.85 mi15:37:394:20:5010:3010:47
12:37
#23196
25.2M
25.20 mi15:42:214:25:3210:324:42
13:38
#23235
Finish
26.22 mi15:52:524:36:0310:3210:31
10:19
#23206
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi219638864886422203(Top 83%)8910(Top 78%)8910(Top 182%)
10K6.21 mi3.10 mi21896+678792+728792+7221797(Top 82%)8715(Top 76%)8715(Top 178%)
15K9.32 mi3.11 mi21976-808825-338825-3322203(Top 83%)8910(Top 78%)8910(Top 182%)
20K12.43 mi3.11 mi22354-3789008-1839008-18323241(Top 87%)9480(Top 83%)9480(Top 194%)
Half13.11 mi0.68 mi22418-649040-329040-3223137(Top 87%)9432(Top 83%)9432(Top 193%)
25K15.53 mi2.42 mi22651-2339179-1399179-13923479(Top 88%)9656(Top 85%)9656(Top 198%)
30K18.64 mi3.11 mi22798-1479284-1059284-10523317(Top 88%)9637(Top 84%)9637(Top 197%)
20M20.00 mi1.36 mi22782+169278+69278+622865(Top 86%)9441(Top 83%)9441(Top 193%)
21M21.00 mi1.00 mi22830-489316-389316-3823079(Top 87%)9592(Top 84%)9592(Top 196%)
35K21.75 mi0.75 mi22864-349345-299345-2923550(Top 88%)9902(Top 87%)9902(Top 203%)
23M23.00 mi1.25 mi22800+649325+209325+2022021(Top 83%)9087(Top 80%)9087(Top 186%)
24M24.00 mi1.00 mi23130-3309495-1709495-17026254(Top 99%)11276(Top 99%)11276(Top 231%)
40K24.85 mi0.85 mi23196-669542-479542-4724567(Top 92%)10462(Top 92%)10462(Top 214%)
25.2M25.20 mi0.35 mi23235-399561-199561-1924658(Top 93%)10513(Top 92%)10513(Top 215%)
Finish26.22 mi1.02 mi23206+299557+49557+422622(Top 85%)9459(Top 83%)9459(Top 194%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

22203

Females

8910

F18-39

8910

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

21797

Females

8715

F18-39

8715

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

22203

Females

8910

F18-39

8910

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23241

Females

9480

F18-39

9480

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

23137

Females

9432

F18-39

9432

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

23479

Females

9656

F18-39

9656

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23317

Females

9637

F18-39

9637

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22865

Females

9441

F18-39

9441

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23079

Females

9592

F18-39

9592

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

23550

Females

9902

F18-39

9902

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

22021

Females

9087

F18-39

9087

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

26254

Females

11276

F18-39

11276

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24567

Females

10462

F18-39

10462

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24658

Females

10513

F18-39

10513

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2story building
+22ft-21ft

Overall

22622

Females

9459

F18-39

9459

Passing Analysis

Category:
Athletes Passed
875
Passed By
2118
Net Change
-1243
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21963
5K → 10K288221+67#21963#21896
10K → 15K139219-80#21896#21976
15K → 20K43421-378#21976#22354
20K → Half771-64#22354#22418
Half → 25K37270-233#22418#22651
25K → 30K74221-147#22651#22798
30K → 20M7054+16#22798#22782
20M → 21M3179-48#22782#22830
21M → 35K2054-34#22830#22864
35K → 23M8925+64#22864#22800
23M → 24M2332-330#22800#23130
24M → 40K2591-66#23130#23196
40K → 25.2M847-39#23196#23235
25.2M → Finish4213+29#23235#23206
TOTALS8752118-1243
📊

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