All Results|Race Analytics|Course|Contact

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Jess Chaffee

Bib: 9010 •F •Age: N/A

TX

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F40-44)
#0 / 1737
Race Day Weather
51°/41°F
overcast clouds
Personalized for Jess

Your Race Performance Report is ready

See how your race unfolded, where your performance changed, and what to focus on next.

Personalized by MyRace AI
Preview insight
Your pace by distance
Fastest segment · 8:00/mi at mile 3.1

Your report includes

  • Race Overview
  • Pacing & Splits
  • Performance Analysis
  • Segment Analysis
  • Passing Analysis
  • Potential Focus Areas
One-time purchase · Instant access · Downloadable PDF · Shareable report

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
24:50
3.11 mi
Rank: #16923
Start → 5K
24:50 | 8:00/mi
10K
51:01
6.21 mi
Rank: #18467 (-1544)
5K → 10K
26:11 | 8:26/mi
15K
1:17:51
9.32 mi
Rank: #19312 (-845)
10K → 15K
26:50 | 8:39/mi
20K
1:46:58
12.43 mi
Rank: #20525 (-1213)
15K → 20K
29:07 | 9:23/mi
HALF
1:53:27
13.11 mi
Rank: #20822 (-297)
20K → HALF
6:29 | 9:31/mi
25K
2:19:59
15.53 mi
Rank: #22303 (-1481)
HALF → 25K
26:32 | 10:57/mi
30K
2:52:19
18.64 mi
Rank: #22801 (-498)
25K → 30K
32:20 | 10:25/mi
20M
3:07:23
20.00 mi
Rank: #23024 (-223)
30K → 20M
15:04 | 11:06/mi
21M
3:19:03
21.00 mi
Rank: #23106 (-82)
20M → 21M
11:40 | 11:40/mi
35K
3:27:03
21.75 mi
Rank: #23185 (-79)
21M → 35K
8:00 | 10:42/mi
23M
3:41:54
23.00 mi
Rank: #23403 (-218)
35K → 23M
14:51 | 11:52/mi
24M
3:54:10
24.00 mi
Rank: #23649 (-246)
23M → 24M
12:16 | 12:16/mi
40K
4:03:33
24.85 mi
Rank: #23657 (-8)
24M → 40K
9:23 | 10:59/mi
25.2M
4:07:39
25.20 mi
Rank: #23669 (-12)
40K → 25.2M
4:06 | 11:54/mi
FINISH
4:18:01
26.22 mi
Rank: #23697 (-28)
25.2M → FINISH
10:22 | 10:11/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:53:27
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:24:34
Pace11:02 /mi
📊Positive Split: 27.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:09:1424:508:0024:50
8:00
-
10K
6.21 mi11:35:2551:018:1326:11
8:26
+0:26
15K
9.32 mi12:02:151:17:518:2226:50
8:39
+0:13
20K
12.43 mi12:31:221:46:588:3729:07
9:23
+0:44
HALF
13.11 mi12:37:511:53:278:406:29
9:31
+0:08
25K
15.53 mi13:04:232:19:599:0126:32
10:57
+1:26
30K
18.64 mi13:36:432:52:199:1532:20
10:25
-0:32
20M
20.00 mi13:51:473:07:239:2315:04
11:06
+0:41
21M
21.00 mi14:03:273:19:039:2911:40
11:40
+0:34
35K
21.75 mi14:11:273:27:039:328:00
10:42
-0:58
23M
23.00 mi14:26:183:41:549:3914:51
11:52
+1:10
24M
24.00 mi14:38:343:54:109:4612:16
12:16
+0:24
40K
24.85 mi14:47:574:03:339:489:23
10:59
-1:17
25.2M
25.20 mi14:52:034:07:399:504:06
11:54
+0:55
FINISH
26.22 mi15:02:254:18:019:5110:22
10:11
-1:43

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

8:00 /mi

Average Pace

9:51 /mi

Slowest Pace

12:16 /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

1:53:27

44% of race

Time at Steady Pace

1:41:41

39% of race

Time at Slower Pace

42:53

17% of race

Average Pace: 9:50 /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 mi11:09:1424:508:0024:50
8:00
#16923
10K
6.21 mi11:35:2551:018:1326:11
8:26
#18467
15K
9.32 mi12:02:151:17:518:2226:50
8:39
#19312
20K
12.43 mi12:31:221:46:588:3729:07
9:23
#20525
HALF
13.11 mi12:37:511:53:278:406:29
9:31
#20822
25K
15.53 mi13:04:232:19:599:0126:32
10:57
#22303
30K
18.64 mi13:36:432:52:199:1532:20
10:25
#22801
20M
20.00 mi13:51:473:07:239:2315:04
11:06
#23024
21M
21.00 mi14:03:273:19:039:2911:40
11:40
#23106
35K
21.75 mi14:11:273:27:039:328:00
10:42
#23185
23M
23.00 mi14:26:183:41:549:3914:51
11:52
#23403
24M
24.00 mi14:38:343:54:109:4612:16
12:16
#23649
40K
24.85 mi14:47:574:03:339:489:23
10:59
#23657
25.2M
25.20 mi14:52:034:07:399:504:06
11:54
#23669
FINISH
26.22 mi15:02:254:18:019:5110:22
10:11
#23697
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi169235884588420875(Top 72%)8053(Top 64%)8053(Top 464%)
10K6.21 mi3.10 mi18467-15446757-8736757-87319960(Top 69%)7575(Top 60%)7575(Top 436%)
15K9.32 mi3.11 mi19312-8457228-4717228-47120875(Top 72%)8053(Top 64%)8053(Top 464%)
20K12.43 mi3.11 mi20525-12137899-6717899-67123350(Top 80%)9367(Top 74%)9367(Top 539%)
HALF13.11 mi0.68 mi20822-2978062-1638062-16324412(Top 84%)9903(Top 79%)9903(Top 570%)
25K15.53 mi2.42 mi22303-14818804-7428804-74226240(Top 90%)10942(Top 87%)10942(Top 630%)
30K18.64 mi3.11 mi22801-4989097-2939097-29324112(Top 83%)9892(Top 79%)9892(Top 569%)
20M20.00 mi1.36 mi23024-2239236-1399236-13925096(Top 86%)10488(Top 83%)10488(Top 604%)
21M21.00 mi1.00 mi23106-829294-589294-5824502(Top 84%)10244(Top 81%)10244(Top 590%)
35K21.75 mi0.75 mi23185-799342-489342-4824687(Top 85%)10353(Top 82%)10353(Top 596%)
23M23.00 mi1.25 mi23403-2189457-1159457-11525951(Top 89%)11045(Top 88%)11045(Top 636%)
24M24.00 mi1.00 mi23649-2469589-1329589-13226936(Top 93%)11580(Top 92%)11580(Top 667%)
40K24.85 mi0.85 mi23657-89605-169605-1624213(Top 83%)10240(Top 81%)10240(Top 590%)
25.2M25.20 mi0.35 mi23669-129616-119616-1124262(Top 84%)10261(Top 82%)10261(Top 591%)
FINISH26.22 mi1.02 mi23697-289652-369652-3624300(Top 84%)10274(Top 82%)10274(Top 591%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21
+97ft-345ft

Overall

20875

Females

8053

F40-44

8053

5K→10K

3.1 - 6.2 mi

Top 69%
×5
+79ft-138ft

Overall

19960

Females

7575

F40-44

7575

10K→15K

6.2 - 9.3 mi

Top 72%
×3
+67ft-78ft

Overall

20875

Females

8053

F40-44

8053

15K→20K

9.3 - 12.4 mi

Top 80%
×5
+106ft-86ft

Overall

23350

Females

9367

F40-44

9367

20K→HALF

12.4 - 13.1 mi

Top 84%
×2
+19ft-37ft

Overall

24412

Females

9903

F40-44

9903

HALF→25K

13.1 - 15.5 mi

Top 90%
×4
+66ft-88ft

Overall

26240

Females

10942

F40-44

10942

25K→30K

15.5 - 18.6 mi

Top 83%
×9
+181ft-148ft

Overall

24112

Females

9892

F40-44

9892

30K→20M

18.6 - 20.0 mi

Top 86%
×5
+64ft-50ft

Overall

25096

Females

10488

F40-44

10488

20M→21M

20.0 - 21.0 mi

Top 84%
×8
+106ft-24ft

Overall

24502

Females

10244

F40-44

10244

21M→35K

21.0 - 21.8 mi

Top 85%
×7
+17ft-86ft

Overall

24687

Females

10353

F40-44

10353

35K→23M

21.8 - 23.0 mi

Top 89%
×5
+23ft-63ft

Overall

25951

Females

11045

F40-44

11045

23M→24M

23.0 - 24.0 mi

Top 93%
×6
+12ft-82ft

Overall

26936

Females

11580

F40-44

11580

24M→40K

24.0 - 24.9 mi

Top 83%
×1
+6ft-20ft

Overall

24213

Females

10240

F40-44

10240

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1
+13ft-16ft

Overall

24262

Females

10261

F40-44

10261

25.2M→FINISH

25.2 - 26.2 mi

Top 84%
×2
+22ft-21ft

Overall

24300

Females

10274

F40-44

10274

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
372
Passed By
2195
Net Change
-6774
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16923
5K → 10K15200-1544#16923#18467
10K → 15K23200-845#18467#19312
15K → 20K15200-1213#19312#20525
20K → HALF6200-297#20525#20822
HALF → 25K3200-1481#20822#22303
25K → 30K68200-498#22303#22801
30K → 20M30200-223#22801#23024
20M → 21M51133-82#23024#23106
21M → 35K27106-79#23106#23185
35K → 23M13200-218#23185#23403
23M → 24M13200-246#23403#23649
24M → 40K5159-8#23649#23657
40K → 25.2M2032-12#23657#23669
25.2M → FINISH3765-28#23669#23697
TOTALS3722195-6774
📊

Passing Analysis Visualizations

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

Time:
Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

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

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

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
Share Feedback