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BOSTON MARATHON 2026

Jessica Cosson

Bib: 15241•F

0:00
0:00
/ mi
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Overall
#0 / 29021
Top 33%
Gender (Female)
#0 / 12578
Top 16%
Division (F18-39)
#0 / 5716
Top 29%
Race Day Weather
51°/41°F
overcast clouds

⏱️ 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
7:23/mi
22:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
45:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:21/mi
1:08:28
↑ 67↓ 78
20K· 12.43 mi
7:22/mi
1:31:19
↑ 106↓ 860.1%
HALF· 13.11 mi
7:19/mi
1:36:18
↑ 19↓ 370.5%
25K· 15.53 mi
7:22/mi
1:54:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:27/mi
2:17:17
↑ 181↓ 1480.2%
20M
7:23/mi
2:27:18
↑ 64↓ 500.2%
21M
7:27/mi
2:34:45
↑ 106↓ 241.6%
35K· 21.75 mi
7:07/mi
2:40:04
↑ 17↓ 861.7%
23M
7:29/mi
2:49:25
↑ 23↓ 630.6%
24M
7:21/mi
2:56:46
↓ 821.3%
40K· 24.85 mi
7:23/mi
3:03:04
↓ 200.3%
25.2M
7:56/mi
3:05:48
↑ 13↓ 160.2%
FINISH· 26.22 mi
6:58/mi
3:12:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HALF⚖️ Balanced
Distance13.11 mi
Time1:36:18
Pace7:21 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:36:35
Pace7:23 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:04:1122:557:2322:55
7:23
-
10K
6.21 mi11:26:5645:407:2122:45
7:20
-0:03
15K
9.32 mi11:49:441:08:287:2122:48
7:21
+0:01
20K
12.43 mi12:12:351:31:197:2122:51
7:22
+0:01
HALF
13.11 mi12:17:341:36:187:214:59
7:19
-0:03
25K
15.53 mi12:35:251:54:097:2117:51
7:22
+0:03
30K
18.64 mi12:58:332:17:177:2223:08
7:27
+0:05
20M
20.00 mi13:08:342:27:187:2210:01
7:23
-0:04
21M
21.00 mi13:16:012:34:457:237:27
7:27
+0:04
35K
21.75 mi13:21:202:40:047:225:19
7:07
-0:20
23M
23.00 mi13:30:412:49:257:229:21
7:29
+0:22
24M
24.00 mi13:38:022:56:467:227:21
7:21
-0:08
40K
24.85 mi13:44:203:03:047:226:18
7:23
+0:02
25.2M
25.20 mi13:47:043:05:487:232:44
7:56
+0:33
FINISH
26.22 mi13:54:093:12:537:227:05
6:58
-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

6:58 /mi

Average Pace

7:22 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:09

99% of race

Time at Steady Pace

2:44

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:21 /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 mi11:04:1122:557:2322:55
7:23
#11735
10K
6.21 mi11:26:5645:407:2122:45
7:20
#11517
15K
9.32 mi11:49:441:08:287:2122:48
7:21
#11456
20K
12.43 mi12:12:351:31:197:2122:51
7:22
#11261
HALF
13.11 mi12:17:341:36:187:214:59
7:19
#11260
25K
15.53 mi12:35:251:54:097:2117:51
7:22
#11064
30K
18.64 mi12:58:332:17:177:2223:08
7:27
#10653
20M
20.00 mi13:08:342:27:187:2210:01
7:23
#10428
21M
21.00 mi13:16:012:34:457:237:27
7:27
#10113
35K
21.75 mi13:21:202:40:047:225:19
7:07
#9995
23M
23.00 mi13:30:412:49:257:229:21
7:29
#9840
24M
24.00 mi13:38:022:56:467:227:21
7:21
#9789
40K
24.85 mi13:44:203:03:047:226:18
7:23
#9685
25.2M
25.20 mi13:47:043:05:487:232:44
7:56
#9642
FINISH
26.22 mi13:54:093:12:537:227:05
6:58
#9484
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi117352765276511425(Top 39%)2693(Top 21%)2693(Top 47%)
10K6.21 mi3.10 mi11517+2182673+922673+9211358(Top 39%)2626(Top 21%)2626(Top 46%)
15K9.32 mi3.11 mi11456+612669+42669+411425(Top 39%)2693(Top 21%)2693(Top 47%)
20K12.43 mi3.11 mi11261+1952597+722597+7210692(Top 37%)2398(Top 19%)2398(Top 42%)
HALF13.11 mi0.68 mi11260+12602-52602-511290(Top 39%)2611(Top 21%)2611(Top 46%)
25K15.53 mi2.42 mi11064+1962520+822520+8210239(Top 35%)2255(Top 18%)2255(Top 39%)
30K18.64 mi3.11 mi10653+4112368+1522368+1529236(Top 32%)1906(Top 15%)1906(Top 33%)
20M20.00 mi1.36 mi10428+2252281+872281+878263(Top 28%)1603(Top 13%)1603(Top 28%)
21M21.00 mi1.00 mi10113+3152158+1232158+1236224(Top 21%)942(Top 7%)942(Top 16%)
35K21.75 mi0.75 mi9995+1182106+522106+527953(Top 27%)1545(Top 12%)1545(Top 27%)
23M23.00 mi1.25 mi9840+1552052+542052+548664(Top 30%)1950(Top 16%)1950(Top 34%)
24M24.00 mi1.00 mi9789+512047+52047+58991(Top 31%)2161(Top 17%)2161(Top 38%)
40K24.85 mi0.85 mi9685+1042024+232024+237965(Top 27%)1784(Top 14%)1784(Top 31%)
25.2M25.20 mi0.35 mi9642+432020+42020+47978(Top 27%)1861(Top 15%)1861(Top 33%)
FINISH26.22 mi1.02 mi9484+1581977+431977+437208(Top 25%)1564(Top 12%)1564(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

11425

Females

2693

F18-39

2693

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

11358

Females

2626

F18-39

2626

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

11425

Females

2693

F18-39

2693

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

10692

Females

2398

F18-39

2398

20K→HALF

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

11290

Females

2611

F18-39

2611

HALF→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

10239

Females

2255

F18-39

2255

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

9236

Females

1906

F18-39

1906

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

8263

Females

1603

F18-39

1603

20M→21M

20.0 - 21.0 mi

Top 21%
×8story building
+106ft-24ft

Overall

6224

Females

942

F18-39

942

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7953

Females

1545

F18-39

1545

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8664

Females

1950

F18-39

1950

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8991

Females

2161

F18-39

2161

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7965

Females

1784

F18-39

1784

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7978

Females

1861

F18-39

1861

25.2M→FINISH

25.2 - 26.2 mi

Top 25%
×2story building
+22ft-21ft

Overall

7208

Females

1564

F18-39

1564

Passing Analysis

Category:
Athletes Passed
2863*
Passed By
611
Net Change
+2251
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11735
5K → 10K381163+218#11735#11517
10K → 15K219158+61#11517#11456
15K → 20K25964+195#11456#11261
20K → HALF2928+1#11261#11260
HALF → 25K23337+196#11260#11064
25K → 30K43625+411#11064#10653
30K → 20M2327+225#10653#10428
20M → 21M3183+315#10428#10113
21M → 35K122*4+118#10113#9995
35K → 23M18631+155#9995#9840
23M → 24M10149+51#9840#9789
24M → 40K11713+104#9789#9685
40K → 25.2M529+43#9685#9642
25.2M → FINISH17820+158#9642#9484
TOTALS2863*611+2251

* 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