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BOSTON MARATHON 2023

Catherine Lowdon

Bib: 17972•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
8:03/mi
25:01
↑ 97↓ 3451.5%
10K· 6.21 mi
8:04/mi
50:05
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:15:03
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:41:16
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:46:45
↑ 19↓ 370.5%
25K· 15.53 mi
8:09/mi
2:06:30
↑ 66↓ 880.2%
30K· 18.64 mi
9:05/mi
2:34:42
↑ 181↓ 1480.2%
20M
11:10/mi
2:49:53
↑ 64↓ 500.2%
21M
11:49/mi
3:01:42
↑ 106↓ 241.6%
35K· 21.75 mi
12:02/mi
3:10:42
↑ 17↓ 861.7%
23M
9:10/mi
3:22:11
↑ 23↓ 630.6%
24M
9:51/mi
3:32:02
↓ 821.3%
40K· 24.85 mi
9:41/mi
3:40:19
↓ 200.3%
25.2M
10:55/mi
3:44:05
↑ 13↓ 160.2%
Finish· 26.22 mi
9:41/mi
3:53:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:45
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time2:07:12
Pace9:42 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5625:018:0325:01
8:03
-
10K
6.21 mi11:41:0050:058:0425:04
8:04
+0:01
15K
9.32 mi12:05:581:15:038:0324:58
8:02
-0:02
20K
12.43 mi12:32:111:41:168:0926:13
8:26
+0:24
Half
13.11 mi12:37:401:46:458:095:29
8:02
-0:24
25K
15.53 mi12:57:252:06:308:0919:45
8:09
+0:07
30K
18.64 mi13:25:372:34:428:1828:12
9:05
+0:56
20M
20.00 mi13:40:482:49:538:3015:11
11:10
+2:05
21M
21.00 mi13:52:373:01:428:3911:49
11:49
+0:39
35K
21.75 mi14:01:373:10:428:469:00
12:02
+0:13
23M
23.00 mi14:13:063:22:118:4711:29
9:10
-2:52
24M
24.00 mi14:22:573:32:028:509:51
9:51
+0:41
40K
24.85 mi14:31:143:40:198:528:17
9:41
-0:10
25.2M
25.20 mi14:35:003:44:058:543:46
10:55
+1:14
Finish
26.22 mi14:44:523:53:578:569:52
9:41
-1:14

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

8:02 /mi

Average Pace

8:56 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:30

54% of race

Time at Steady Pace

1:07:41

29% of race

Time at Slower Pace

39:46

17% of race

Average Pace: 8:55 /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 mi11:15:5625:018:0325:01
8:03
#14393
10K
6.21 mi11:41:0050:058:0425:04
8:04
#14837
15K
9.32 mi12:05:581:15:038:0324:58
8:02
#14769
20K
12.43 mi12:32:111:41:168:0926:13
8:26
#15245
Half
13.11 mi12:37:401:46:458:095:29
8:02
#15205
25K
15.53 mi12:57:252:06:308:0919:45
8:09
#14942
30K
18.64 mi13:25:372:34:428:1828:12
9:05
#15470
20M
20.00 mi13:40:482:49:538:3015:11
11:10
#16494
21M
21.00 mi13:52:373:01:428:3911:49
11:49
#17112
35K
21.75 mi14:01:373:10:428:469:00
12:02
#17740
23M
23.00 mi14:13:063:22:118:4711:29
9:10
#17707
24M
24.00 mi14:22:573:32:028:509:51
9:51
#17914
40K
24.85 mi14:31:143:40:198:528:17
9:41
#17971
25.2M
25.20 mi14:35:003:44:058:543:46
10:55
#18033
Finish
26.22 mi14:44:523:53:578:569:52
9:41
#18164
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi143934266426614712(Top 55%)4517(Top 40%)4517(Top 92%)
10K6.21 mi3.10 mi14837-4444551-2854551-28515311(Top 58%)4860(Top 43%)4860(Top 100%)
15K9.32 mi3.11 mi14769+684520+314520+3114712(Top 55%)4517(Top 40%)4517(Top 92%)
20K12.43 mi3.11 mi15245-4764837-3174837-31716489(Top 62%)5644(Top 49%)5644(Top 116%)
Half13.11 mi0.68 mi15205+404814+234814+2314761(Top 55%)4557(Top 40%)4557(Top 93%)
25K15.53 mi2.42 mi14942+2634676+1384676+13813869(Top 52%)4145(Top 36%)4145(Top 85%)
30K18.64 mi3.11 mi15470-5285056-3805056-38017588(Top 66%)6409(Top 56%)6409(Top 131%)
20M20.00 mi1.36 mi16494-10245695-6395695-63922978(Top 86%)9498(Top 83%)9498(Top 194%)
21M21.00 mi1.00 mi17112-6186054-3596054-35922449(Top 84%)9247(Top 81%)9247(Top 189%)
35K21.75 mi0.75 mi17740-6286451-3976451-39724712(Top 93%)10509(Top 92%)10509(Top 215%)
23M23.00 mi1.25 mi17707+336448+36448+316930(Top 64%)6256(Top 55%)6256(Top 128%)
24M24.00 mi1.00 mi17914-2076574-1266574-12620385(Top 77%)8192(Top 72%)8192(Top 168%)
40K24.85 mi0.85 mi17971-576619-456619-4518990(Top 71%)7486(Top 66%)7486(Top 153%)
25.2M25.20 mi0.35 mi18033-626664-456664-4520287(Top 76%)8200(Top 72%)8200(Top 168%)
Finish26.22 mi1.02 mi18164-1316745-816745-8120741(Top 78%)8426(Top 74%)8426(Top 173%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14712

Females

4517

F18-39

4517

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

15311

Females

4860

F18-39

4860

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14712

Females

4517

F18-39

4517

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

16489

Females

5644

F18-39

5644

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14761

Females

4557

F18-39

4557

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

13869

Females

4145

F18-39

4145

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17588

Females

6409

F18-39

6409

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22978

Females

9498

F18-39

9498

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

22449

Females

9247

F18-39

9247

21M→35K

21.0 - 21.8 mi

Top 93%
×7story building
+17ft-86ft

Overall

24712

Females

10509

F18-39

10509

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

16930

Females

6256

F18-39

6256

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

20385

Females

8192

F18-39

8192

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18990

Females

7486

F18-39

7486

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

20287

Females

8200

F18-39

8200

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20741

Females

8426

F18-39

8426

Passing Analysis

Category:
Athletes Passed
1029
Passed By
4800
Net Change
-3771
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14393
5K → 10K136580-444#14393#14837
10K → 15K218150+68#14837#14769
15K → 20K71547-476#14769#15245
20K → Half5919+40#15245#15205
Half → 25K28724+263#15205#14942
25K → 30K59587-528#14942#15470
30K → 20M51029-1024#15470#16494
20M → 21M5623-618#16494#17112
21M → 35K4632-628#17112#17740
35K → 23M10168+33#17740#17707
23M → 24M23230-207#17707#17914
24M → 40K3289-57#17914#17971
40K → 25.2M1072-62#17971#18033
25.2M → Finish19150-131#18033#18164
TOTALS10294800-3771
📊

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