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BOSTON MARATHON 2023

Kaitlin Marsh

Bib: 14351•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 42%
Gender (Female)
#0 / 11423
Top 23%
Division (F18-39)
#0 / 4884
Top 40%
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
7:42/mi
23:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:35
↑ 79↓ 1380.4%
15K· 9.32 mi
7:35/mi
1:11:10
↑ 67↓ 78
20K· 12.43 mi
7:46/mi
1:35:18
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:40:32
↑ 19↓ 370.5%
25K· 15.53 mi
7:48/mi
1:59:27
↑ 66↓ 880.2%
30K· 18.64 mi
8:01/mi
2:24:20
↑ 181↓ 1480.2%
20M
8:02/mi
2:35:15
↑ 64↓ 500.2%
21M
8:43/mi
2:43:58
↑ 106↓ 241.6%
35K· 21.75 mi
7:48/mi
2:49:48
↑ 17↓ 861.7%
23M
8:13/mi
3:00:05
↑ 23↓ 630.6%
24M
8:07/mi
3:08:12
↓ 821.3%
40K· 24.85 mi
8:14/mi
3:15:14
↓ 200.3%
25.2M
9:05/mi
3:18:22
↑ 13↓ 160.2%
Finish· 26.22 mi
8:07/mi
3:26:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:32
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time1:46:06
Pace8:06 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3823:557:4223:55
7:42
-
10K
6.21 mi11:16:1847:357:3923:40
7:37
-0:05
15K
9.32 mi11:39:531:11:107:3823:35
7:35
-0:02
20K
12.43 mi12:04:011:35:187:4024:08
7:46
+0:11
Half
13.11 mi12:09:151:40:327:405:14
7:40
-0:06
25K
15.53 mi12:28:101:59:277:4118:55
7:48
+0:08
30K
18.64 mi12:53:032:24:207:4524:53
8:01
+0:13
20M
20.00 mi13:03:582:35:157:4610:55
8:02
+0:01
21M
21.00 mi13:12:412:43:587:488:43
8:43
+0:41
35K
21.75 mi13:18:312:49:487:485:50
7:48
-0:55
23M
23.00 mi13:28:483:00:057:5010:17
8:13
+0:25
24M
24.00 mi13:36:553:08:127:518:07
8:07
-0:06
40K
24.85 mi13:43:573:15:147:517:02
8:14
+0:07
25.2M
25.20 mi13:47:053:18:227:523:08
9:05
+0:51
Finish
26.22 mi13:55:213:26:387:538:16
8:07
-0:58

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

7:35 /mi

Average Pace

7:53 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:47

94% of race

Time at Steady Pace

8:43

4% of race

Time at Slower Pace

3:08

2% of race

Average Pace: 7:53 /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 mi10:52:3823:557:4223:55
7:42
#11443
10K
6.21 mi11:16:1847:357:3923:40
7:37
#11420
15K
9.32 mi11:39:531:11:107:3823:35
7:35
#11255
20K
12.43 mi12:04:011:35:187:4024:08
7:46
#11254
Half
13.11 mi12:09:151:40:327:405:14
7:40
#11270
25K
15.53 mi12:28:101:59:277:4118:55
7:48
#11214
30K
18.64 mi12:53:032:24:207:4524:53
8:01
#11110
20M
20.00 mi13:03:582:35:157:4610:55
8:02
#11044
21M
21.00 mi13:12:412:43:587:488:43
8:43
#11070
35K
21.75 mi13:18:312:49:487:485:50
7:48
#11055
23M
23.00 mi13:28:483:00:057:5010:17
8:13
#11038
24M
24.00 mi13:36:553:08:127:518:07
8:07
#11092
40K
24.85 mi13:43:573:15:147:517:02
8:14
#11075
25.2M
25.20 mi13:47:053:18:227:523:08
9:05
#11109
Finish
26.22 mi13:55:213:26:387:538:16
8:07
#11172
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi114432565256510948(Top 41%)2313(Top 20%)2313(Top 47%)
10K6.21 mi3.10 mi11420+232560+52560+511500(Top 43%)2602(Top 23%)2602(Top 53%)
15K9.32 mi3.11 mi11255+1652468+922468+9210948(Top 41%)2313(Top 20%)2313(Top 47%)
20K12.43 mi3.11 mi11254+12474-62474-611473(Top 43%)2671(Top 23%)2671(Top 55%)
Half13.11 mi0.68 mi11270-162483-92483-911681(Top 44%)2725(Top 24%)2725(Top 56%)
25K15.53 mi2.42 mi11214+562481+22481+211120(Top 42%)2546(Top 22%)2546(Top 52%)
30K18.64 mi3.11 mi11110+1042468+132468+1310986(Top 41%)2629(Top 23%)2629(Top 54%)
20M20.00 mi1.36 mi11044+662460+82460+810543(Top 40%)2510(Top 22%)2510(Top 51%)
21M21.00 mi1.00 mi11070-262496-362496-3611775(Top 44%)3281(Top 29%)3281(Top 67%)
35K21.75 mi0.75 mi11055+152496249610677(Top 40%)2711(Top 24%)2711(Top 56%)
23M23.00 mi1.25 mi11038+172517-212517-2111282(Top 42%)3143(Top 28%)3143(Top 64%)
24M24.00 mi1.00 mi11092-542571-542571-5412052(Top 45%)3609(Top 32%)3609(Top 74%)
40K24.85 mi0.85 mi11075+172589-182589-1811557(Top 43%)3435(Top 30%)3435(Top 70%)
25.2M25.20 mi0.35 mi11109-342618-292618-2913027(Top 49%)4225(Top 37%)4225(Top 87%)
Finish26.22 mi1.02 mi11172-632675-572675-5712865(Top 48%)4136(Top 36%)4136(Top 85%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10948

Females

2313

F18-39

2313

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11500

Females

2602

F18-39

2602

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10948

Females

2313

F18-39

2313

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

11473

Females

2671

F18-39

2671

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11681

Females

2725

F18-39

2725

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

11120

Females

2546

F18-39

2546

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10986

Females

2629

F18-39

2629

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

10543

Females

2510

F18-39

2510

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

11775

Females

3281

F18-39

3281

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

10677

Females

2711

F18-39

2711

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11282

Females

3143

F18-39

3143

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12052

Females

3609

F18-39

3609

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11557

Females

3435

F18-39

3435

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13027

Females

4225

F18-39

4225

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12865

Females

4136

F18-39

4136

Passing Analysis

Category:
Athletes Passed
1691*
Passed By
1420
Net Change
+271
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11443
5K → 10K318295+23#11443#11420
10K → 15K270105+165#11420#11255
15K → 20K170169+1#11255#11254
20K → Half1935-16#11254#11270
Half → 25K15397+56#11270#11214
25K → 30K224120+104#11214#11110
30K → 20M122*56+66#11110#11044
20M → 21M6389-26#11044#11070
21M → 35K5136+15#11070#11055
35K → 23M10083+17#11055#11038
23M → 24M52106-54#11038#11092
24M → 40K7760+17#11092#11075
40K → 25.2M2155-34#11075#11109
25.2M → Finish51114-63#11109#11172
TOTALS1691*1420+271

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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