Boston Marathon logo
BOSTON MARATHON 2023

Kristin Clark

Bib: 18734•F

MT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 43%
Division (F45-49)
#0 / 1817
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
8:24/mi
26:07
↑ 97↓ 3451.5%
10K· 6.21 mi
8:03/mi
51:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:17/mi
1:16:53
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:43:17
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:48:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:38/mi
2:09:48
↑ 66↓ 880.2%
30K· 18.64 mi
9:06/mi
2:38:05
↑ 181↓ 1480.2%
20M
9:14/mi
2:50:38
↑ 64↓ 500.2%
21M
9:53/mi
3:00:31
↑ 106↓ 241.6%
35K· 21.75 mi
8:56/mi
3:07:12
↑ 17↓ 861.7%
23M
9:15/mi
3:18:47
↑ 23↓ 630.6%
24M
9:00/mi
3:27:47
↓ 821.3%
40K· 24.85 mi
9:11/mi
3:35:38
↓ 200.3%
25.2M
9:52/mi
3:39:02
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:48:08
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:53
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:59:15
Pace9:06 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1126:078:2426:07
8:24
-
10K
6.21 mi11:42:1251:088:1425:01
8:03
-0:21
15K
9.32 mi12:07:571:16:538:1525:45
8:17
+0:14
20K
12.43 mi12:34:211:43:178:1926:24
8:30
+0:13
Half
13.11 mi12:39:571:48:538:185:36
8:12
-0:18
25K
15.53 mi13:00:522:09:488:2120:55
8:38
+0:26
30K
18.64 mi13:29:092:38:058:2928:17
9:06
+0:28
20M
20.00 mi13:41:422:50:388:3212:33
9:14
+0:08
21M
21.00 mi13:51:353:00:318:369:53
9:53
+0:39
35K
21.75 mi13:58:163:07:128:366:41
8:56
-0:57
23M
23.00 mi14:09:513:18:478:3911:35
9:15
+0:19
24M
24.00 mi14:18:513:27:478:399:00
9:00
-0:15
40K
24.85 mi14:26:423:35:388:417:51
9:11
+0:11
25.2M
25.20 mi14:30:063:39:028:423:24
9:52
+0:41
Finish
26.22 mi14:39:123:48:088:429:06
8:56
-0:56

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

8:03 /mi

Average Pace

8:42 /mi

Slowest Pace

9:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:48

57% of race

Time at Steady Pace

1:00:55

27% of race

Time at Slower Pace

37:25

16% of race

Average Pace: 8:42 /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 mi11:17:1126:078:2426:07
8:24
#16937
10K
6.21 mi11:42:1251:088:1425:01
8:03
#16038
15K
9.32 mi12:07:571:16:538:1525:45
8:17
#16181
20K
12.43 mi12:34:211:43:178:1926:24
8:30
#16369
Half
13.11 mi12:39:571:48:538:185:36
8:12
#16337
25K
15.53 mi13:00:522:09:488:2120:55
8:38
#16445
30K
18.64 mi13:29:092:38:058:2928:17
9:06
#16653
20M
20.00 mi13:41:422:50:388:3212:33
9:14
#16726
21M
21.00 mi13:51:353:00:318:369:53
9:53
#16776
35K
21.75 mi13:58:163:07:128:366:41
8:56
#16803
23M
23.00 mi14:09:513:18:478:3911:35
9:15
#16833
24M
24.00 mi14:18:513:27:478:399:00
9:00
#16870
40K
24.85 mi14:26:423:35:388:417:51
9:11
#16847
25.2M
25.20 mi14:30:063:39:028:423:24
9:52
#16859
Finish
26.22 mi14:39:123:48:088:429:06
8:56
#16891
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi169375887588716480(Top 62%)5584(Top 49%)5584(Top 307%)
10K6.21 mi3.10 mi16038+8995304+5835304+58315203(Top 57%)4798(Top 42%)4798(Top 264%)
15K9.32 mi3.11 mi16181-1435399-955399-9516480(Top 62%)5584(Top 49%)5584(Top 307%)
20K12.43 mi3.11 mi16369-1885535-1365535-13616843(Top 63%)5847(Top 51%)5847(Top 322%)
Half13.11 mi0.68 mi16337+325517+185517+1815937(Top 60%)5269(Top 46%)5269(Top 290%)
25K15.53 mi2.42 mi16445-1085606-895606-8916973(Top 64%)5991(Top 52%)5991(Top 330%)
30K18.64 mi3.11 mi16653-2085779-1735779-17317711(Top 67%)6471(Top 57%)6471(Top 356%)
20M20.00 mi1.36 mi16726-735825-465825-4617725(Top 67%)6589(Top 58%)6589(Top 363%)
21M21.00 mi1.00 mi16776-505854-295854-2917598(Top 66%)6521(Top 57%)6521(Top 359%)
35K21.75 mi0.75 mi16803-275879-255879-2517639(Top 66%)6625(Top 58%)6625(Top 365%)
23M23.00 mi1.25 mi16833-305919-405919-4017315(Top 65%)6458(Top 57%)6458(Top 355%)
24M24.00 mi1.00 mi16870-375965-465965-4617249(Top 65%)6487(Top 57%)6487(Top 357%)
40K24.85 mi0.85 mi16847+235976-115976-1117038(Top 64%)6423(Top 56%)6423(Top 353%)
25.2M25.20 mi0.35 mi16859-125985-95985-916848(Top 63%)6339(Top 55%)6339(Top 349%)
Finish26.22 mi1.02 mi16891-326016-316016-3117639(Top 66%)6724(Top 59%)6724(Top 370%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

16480

Females

5584

F45-49

5584

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

15203

Females

4798

F45-49

4798

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

16480

Females

5584

F45-49

5584

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16843

Females

5847

F45-49

5847

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15937

Females

5269

F45-49

5269

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

16973

Females

5991

F45-49

5991

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17711

Females

6471

F45-49

6471

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17725

Females

6589

F45-49

6589

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

17598

Females

6521

F45-49

6521

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

17639

Females

6625

F45-49

6625

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

17315

Females

6458

F45-49

6458

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

17249

Females

6487

F45-49

6487

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17038

Females

6423

F45-49

6423

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16848

Females

6339

F45-49

6339

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17639

Females

6724

F45-49

6724

Passing Analysis

Category:
Athletes Passed
1925
Passed By
1879
Net Change
+46
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16937
5K → 10K96869+899#16937#16038
10K → 15K146289-143#16038#16181
15K → 20K107295-188#16181#16369
20K → Half5422+32#16369#16337
Half → 25K97205-108#16337#16445
25K → 30K123331-208#16445#16653
30K → 20M59132-73#16653#16726
20M → 21M66116-50#16726#16776
21M → 35K4269-27#16776#16803
35K → 23M6797-30#16803#16833
23M → 24M4885-37#16833#16870
24M → 40K6744+23#16870#16847
40K → 25.2M2234-12#16847#16859
25.2M → Finish5991-32#16859#16891
TOTALS19251879+46
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing