Boston Marathon logo
BOSTON MARATHON 2025

Jennifer Byrne

MA

Bib: 31139 F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
11:25/mi
35:27
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
11:17/mi
1:10:30
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
11:55/mi
1:47:31
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
12:43/mi
2:27:01
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
12:16/mi
2:35:23
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
14:10/mi
3:09:43
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
14:16/mi
3:54:02
↑ 181↓ 1480.2%
138 ft elev
20M
14:31/mi
4:13:45
↑ 64↓ 500.2%
148 ft elev
21M
16:01/mi
4:29:46
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
12:51/mi
4:39:23
↑ 17↓ 861.7%
156 ft elev
23M
14:06/mi
4:57:02
↑ 23↓ 630.6%
116 ft elev
24M
13:45/mi
5:10:47
↓ 821.3%
34 ft elev
40K· 24.85 mi
14:37/mi
5:23:17
↓ 200.3%
20 ft elev
25.2M
15:40/mi
5:28:41
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
11:58/mi
5:40:53
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
2:35:2311:51 /mi⚡ faster
2nd Half
3:05:3014:09 /mi+19.4%
Positive split — 19.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
35:2711:253.11 mi35:27
11:25
-
10K
1:10:3011:213.10 mi35:03
11:17
-0:08
15K
1:47:3111:323.11 mi37:01
11:55
+0:38
20K
2:27:0111:503.11 mi39:30
12:43
+0:48
Half(13.11 mi)
2:35:2311:510.68 mi8:22
12:16
-0:27
25K
3:09:4312:132.42 mi34:20
14:10
+1:54
30K
3:54:0212:333.11 mi44:19
14:16
+0:06
20M
4:13:4512:411.36 mi19:43
14:31
+0:15
21M
4:29:4612:511.00 mi16:01
16:01
+1:30
35K
4:39:2312:510.75 mi9:37
12:51
-3:10
23M
4:57:0212:551.25 mi17:39
14:06
+1:15
24M
5:10:4712:571.00 mi13:45
13:45
-0:21
40K
5:23:1713:000.85 mi12:30
14:37
+0:52
25.2M
5:28:4113:030.35 mi5:24
15:40
+1:03
Finish(26.22 mi)
5:40:5313:011.02 mi12:12
11:58
-3:42
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

11:17 /mi

Average Pace

13:01 /mi

Slowest Pace

16:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:57:12

52% of race

Time at Steady Pace

1:50:03

32% of race

Time at Slower Pace

53:38

16% of race

Average Pace: 13:00 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi279411192111921275671172811728
10K6.21 mi3.10 mi27683+25811759+16211759+162273691158711587
15K9.32 mi3.11 mi27662+2111758+111758+1275671172811728
20K12.43 mi3.11 mi27695-3311796-3811796-38276641179811798
Half13.11 mi0.68 mi27697-211797-111797-1276351178911789
25K15.53 mi2.42 mi27762-6511836-3911836-39279661199411994
30K18.64 mi3.11 mi27768-611848-1211848-12276941189011890
20M20.00 mi1.36 mi2776811858-1011858-10276291188111881
21M21.00 mi1.00 mi27783-1511870-1211870-12278131196411964
35K21.75 mi0.75 mi27767+1611867+311867+3268291150911509
23M23.00 mi1.25 mi27763+411866+111866+1273971180511805
24M24.00 mi1.00 mi27766-311875-911875-9274871187811878
40K24.85 mi0.85 mi27777-1111890-1511890-15275741190611906
25.2M25.20 mi0.35 mi27780-311893-311893-3275351190711907
Finish26.22 mi1.02 mi27754+2611887+611887+6267521150611506

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

27567

Females

11728

F45-49

11728

5K→10K

3.1 - 6.2 mi

Top 96%
×5story building
+79ft-138ft

Overall

27369

Females

11587

F45-49

11587

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

27567

Females

11728

F45-49

11728

15K→20K

9.3 - 12.4 mi

Top 97%
×5story building
+106ft-86ft

Overall

27664

Females

11798

F45-49

11798

20K→Half

12.4 - 13.1 mi

Top 97%
×2story building
+19ft-37ft

Overall

27635

Females

11789

F45-49

11789

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

27966

Females

11994

F45-49

11994

25K→30K

15.5 - 18.6 mi

Top 98%
×9story building
+181ft-148ft

Overall

27694

Females

11890

F45-49

11890

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

27629

Females

11881

F45-49

11881

20M→21M

20.0 - 21.0 mi

Top 98%
×8story building
+106ft-24ft

Overall

27813

Females

11964

F45-49

11964

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

26829

Females

11509

F45-49

11509

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27397

Females

11805

F45-49

11805

23M→24M

23.0 - 24.0 mi

Top 97%
×6story building
+12ft-82ft

Overall

27487

Females

11878

F45-49

11878

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27574

Females

11906

F45-49

11906

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

27535

Females

11907

F45-49

11907

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

26752

Females

11506

F45-49

11506

Passing Analysis

Category:
Athletes Passed
659
Passed By
472
Net Change
+187
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27941
5K → 10K2668+258#27941#27683
10K → 15K9877+21#27683#27662
15K → 20K5790-33#27662#27695
20K → Half1012-2#27695#27697
Half → 25K3297-65#27697#27762
25K → 30K4955-6#27762#27768
30K → 20M28280#27768#27768
20M → 21M1732-15#27768#27783
21M → 35K259+16#27783#27767
35K → 23M2420+4#27767#27763
23M → 24M1417-3#27763#27766
24M → 40K718-11#27766#27777
40K → 25.2M25-3#27777#27780
25.2M → Finish304+26#27780#27754
TOTALS659472+187

Passing Charts

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