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BOSTON MARATHON 2026

Jen Koss

Bib: 11524•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 40%
Age Group (F45-49)
#0 / 1786
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
26:01
3.11 mi
Rank: #19365
Start → 5K
26:01 | 8:23/mi
10K
52:09
6.21 mi
Rank: #19589 (-224)
5K → 10K
26:08 | 8:25/mi
15K
1:18:00
9.32 mi
Rank: #19403 (+186)
10K → 15K
25:51 | 8:20/mi
20K
1:44:01
12.43 mi
Rank: #19198 (+205)
15K → 20K
26:01 | 8:23/mi
HALF
1:49:41
13.11 mi
Rank: #19185 (+13)
20K → HALF
5:40 | 8:19/mi
25K
2:09:59
15.53 mi
Rank: #18956 (+229)
HALF → 25K
20:18 | 8:23/mi
30K
2:36:21
18.64 mi
Rank: #18537 (+419)
25K → 30K
26:22 | 8:30/mi
20M
2:47:51
20.00 mi
Rank: #18351 (+186)
30K → 20M
11:30 | 8:28/mi
21M
2:56:24
21.00 mi
Rank: #18075 (+276)
20M → 21M
8:33 | 8:33/mi
35K
3:02:39
21.75 mi
Rank: #18020 (+55)
21M → 35K
6:15 | 8:22/mi
23M
3:13:23
23.00 mi
Rank: #17877 (+143)
35K → 23M
10:44 | 8:35/mi
24M
3:22:30
24.00 mi
Rank: #17991 (-114)
23M → 24M
9:07 | 9:07/mi
40K
3:29:39
24.85 mi
Rank: #17861 (+130)
24M → 40K
7:09 | 8:22/mi
25.2M
3:32:48
25.20 mi
Rank: #17813 (+48)
40K → 25.2M
3:09 | 9:09/mi
FINISH
3:40:52
26.22 mi
Rank: #17669 (+144)
25.2M → FINISH
8:04 | 7:55/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:49:41
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:51:11
Pace8:29 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:33:2426:018:2326:01
8:23
-
10K
6.21 mi10:59:3252:098:2426:08
8:25
+0:02
15K
9.32 mi11:25:231:18:008:2325:51
8:20
-0:05
20K
12.43 mi11:51:241:44:018:2326:01
8:23
+0:03
HALF
13.11 mi11:57:041:49:418:235:40
8:19
-0:04
25K
15.53 mi12:17:222:09:598:2320:18
8:23
+0:04
30K
18.64 mi12:43:442:36:218:2426:22
8:30
+0:07
20M
20.00 mi12:55:142:47:518:2411:30
8:28
-0:02
21M
21.00 mi13:03:472:56:248:258:33
8:33
+0:05
35K
21.75 mi13:10:023:02:398:246:15
8:22
-0:11
23M
23.00 mi13:20:463:13:238:2510:44
8:35
+0:13
24M
24.00 mi13:29:533:22:308:279:07
9:07
+0:32
40K
24.85 mi13:37:023:29:398:277:09
8:22
-0:45
25.2M
25.20 mi13:40:113:32:488:273:09
9:09
+0:47
FINISH
26.22 mi13:48:153:40:528:268:04
7:55
-1:14

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:55 /mi

Average Pace

8:26 /mi

Slowest Pace

9:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

3:28:36

94% of race

Time at Steady Pace

12:16

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:25 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:33:2426:018:2326:01
8:23
#19365
10K
6.21 mi10:59:3252:098:2426:08
8:25
#19589
15K
9.32 mi11:25:231:18:008:2325:51
8:20
#19403
20K
12.43 mi11:51:241:44:018:2326:01
8:23
#19198
HALF
13.11 mi11:57:041:49:418:235:40
8:19
#19185
25K
15.53 mi12:17:222:09:598:2320:18
8:23
#18956
30K
18.64 mi12:43:442:36:218:2426:22
8:30
#18537
20M
20.00 mi12:55:142:47:518:2411:30
8:28
#18351
21M
21.00 mi13:03:472:56:248:258:33
8:33
#18075
35K
21.75 mi13:10:023:02:398:246:15
8:22
#18020
23M
23.00 mi13:20:463:13:238:2510:44
8:35
#17877
24M
24.00 mi13:29:533:22:308:279:07
9:07
#17991
40K
24.85 mi13:37:023:29:398:277:09
8:22
#17861
25.2M
25.20 mi13:40:113:32:488:273:09
9:09
#17813
FINISH
26.22 mi13:48:153:40:528:268:04
7:55
#17669
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi193657285728519103(Top 66%)7091(Top 56%)7091(Top 397%)
10K6.21 mi3.10 mi19589-2247398-1137398-11319852(Top 68%)7509(Top 60%)7509(Top 420%)
15K9.32 mi3.11 mi19403+1867278+1207278+12019103(Top 66%)7091(Top 56%)7091(Top 397%)
20K12.43 mi3.11 mi19198+2057169+1097169+10918564(Top 64%)6833(Top 54%)6833(Top 383%)
HALF13.11 mi0.68 mi19185+137160+97160+919131(Top 66%)7102(Top 56%)7102(Top 398%)
25K15.53 mi2.42 mi18956+2297049+1117049+11117819(Top 61%)6458(Top 51%)6458(Top 362%)
30K18.64 mi3.11 mi18537+4196852+1976852+19716860(Top 58%)6031(Top 48%)6031(Top 338%)
20M20.00 mi1.36 mi18351+1866757+956757+9516043(Top 55%)5674(Top 45%)5674(Top 318%)
21M21.00 mi1.00 mi18075+2766628+1296628+12913510(Top 47%)4338(Top 34%)4338(Top 243%)
35K21.75 mi0.75 mi18020+556605+236605+2316805(Top 58%)6216(Top 49%)6216(Top 348%)
23M23.00 mi1.25 mi17877+1436552+536552+5316194(Top 56%)5959(Top 47%)5959(Top 334%)
24M24.00 mi1.00 mi17991-1146636-846636-8419948(Top 69%)8025(Top 64%)8025(Top 449%)
40K24.85 mi0.85 mi17861+1306576+606576+6014897(Top 51%)5388(Top 43%)5388(Top 302%)
25.2M25.20 mi0.35 mi17813+486557+196557+1915534(Top 54%)5733(Top 46%)5733(Top 321%)
FINISH26.22 mi1.02 mi17669+1446492+656492+6514650(Top 50%)5258(Top 42%)5258(Top 294%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21
+97ft-345ft

Overall

19103

Females

7091

F45-49

7091

5K→10K

3.1 - 6.2 mi

Top 68%
×5
+79ft-138ft

Overall

19852

Females

7509

F45-49

7509

10K→15K

6.2 - 9.3 mi

Top 66%
×3
+67ft-78ft

Overall

19103

Females

7091

F45-49

7091

15K→20K

9.3 - 12.4 mi

Top 64%
×5
+106ft-86ft

Overall

18564

Females

6833

F45-49

6833

20K→HALF

12.4 - 13.1 mi

Top 66%
×2
+19ft-37ft

Overall

19131

Females

7102

F45-49

7102

HALF→25K

13.1 - 15.5 mi

Top 61%
×4
+66ft-88ft

Overall

17819

Females

6458

F45-49

6458

25K→30K

15.5 - 18.6 mi

Top 58%
×9
+181ft-148ft

Overall

16860

Females

6031

F45-49

6031

30K→20M

18.6 - 20.0 mi

Top 55%
×5
+64ft-50ft

Overall

16043

Females

5674

F45-49

5674

20M→21M

20.0 - 21.0 mi

Top 47%
×8
+106ft-24ft

Overall

13510

Females

4338

F45-49

4338

21M→35K

21.0 - 21.8 mi

Top 58%
×7
+17ft-86ft

Overall

16805

Females

6216

F45-49

6216

35K→23M

21.8 - 23.0 mi

Top 56%
×5
+23ft-63ft

Overall

16194

Females

5959

F45-49

5959

23M→24M

23.0 - 24.0 mi

Top 69%
×6
+12ft-82ft

Overall

19948

Females

8025

F45-49

8025

24M→40K

24.0 - 24.9 mi

Top 51%
×1
+6ft-20ft

Overall

14897

Females

5388

F45-49

5388

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1
+13ft-16ft

Overall

15534

Females

5733

F45-49

5733

25.2M→FINISH

25.2 - 26.2 mi

Top 50%
×2
+22ft-21ft

Overall

14650

Females

5258

F45-49

5258

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2560*
Passed By
668
Net Change
+1696
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19365
5K → 10K172200-224#19365#19589
10K → 15K291*105+186#19589#19403
15K → 20K260*55+205#19403#19198
20K → HALF3623+13#19198#19185
HALF → 25K254*25+229#19185#18956
25K → 30K438*19+419#18956#18537
30K → 20M19711+186#18537#18351
20M → 21M278*2+276#18351#18075
21M → 35K7116+55#18075#18020
35K → 23M17229+143#18020#17877
23M → 24M35149-114#17877#17991
24M → 40K1388+130#17991#17861
40K → 25.2M6012+48#17861#17813
25.2M → FINISH15814+144#17813#17669
TOTALS2560*668+1696

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

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing