Boston Marathon logo
BOSTON MARATHON 2025

Gretchen Yallowitz

Bib: 23978•F

NY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
Top 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:40
Rank: #18491
Start → 5K
25:40 | 8:16/mi
10K· 6.21 mi
51:29
Rank: #18521 (-30)
5K → 10K
25:49 | 8:19/mi
15K· 9.32 mi
1:17:10
Rank: #18276 (+245)
10K → 15K
25:41 | 8:16/mi
20K· 12.43 mi
1:43:45
Rank: #18308 (-32)
15K → 20K
26:35 | 8:33/mi
Half· 13.11 mi
1:49:31
Rank: #18328 (-20)
20K → Half
5:46 | 8:27/mi
25K· 15.53 mi
2:11:05
Rank: #18527 (-199)
Half → 25K
21:34 | 8:54/mi
30K· 18.64 mi
2:40:39
Rank: #18862 (-335)
25K → 30K
29:34 | 9:31/mi
20M
2:53:40
Rank: #18927 (-65)
30K → 20M
13:01 | 9:35/mi
21M
3:04:08
Rank: #19005 (-78)
20M → 21M
10:28 | 10:28/mi
35K· 21.75 mi
3:11:04
Rank: #19027 (-22)
21M → 35K
6:56 | 9:16/mi
23M
3:23:10
Rank: #19068 (-41)
35K → 23M
12:06 | 9:40/mi
24M
3:32:45
Rank: #19115 (-47)
23M → 24M
9:35 | 9:35/mi
40K· 24.85 mi
3:40:56
Rank: #19100 (+15)
24M → 40K
8:11 | 9:34/mi
25.2M
3:44:30
Rank: #19083 (+17)
40K → 25.2M
3:34 | 10:21/mi
Finish· 26.22 mi
3:53:58
Rank: #19130 (-47)
25.2M → Finish
9:28 | 9:17/mi

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
Time1:49:31
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time2:04:27
Pace9:30 /mi
📊Positive Split: 13.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:2925:408:1625:40
8:16
-
10K
6.21 mi11:49:1851:298:1725:49
8:19
+0:03
15K
9.32 mi12:14:591:17:108:1725:41
8:16
-0:03
20K
12.43 mi12:41:341:43:458:2126:35
8:33
+0:17
Half
13.11 mi12:47:201:49:318:215:46
8:27
-0:06
25K
15.53 mi13:08:542:11:058:2621:34
8:54
+0:27
30K
18.64 mi13:38:282:40:398:3729:34
9:31
+0:37
20M
20.00 mi13:51:292:53:408:4113:01
9:35
+0:04
21M
21.00 mi14:01:573:04:088:4610:28
10:28
+0:53
35K
21.75 mi14:08:533:11:048:476:56
9:16
-1:12
23M
23.00 mi14:20:593:23:108:5012:06
9:40
+0:24
24M
24.00 mi14:30:343:32:458:529:35
9:35
-0:05
40K
24.85 mi14:38:453:40:568:538:11
9:34
-0:01
25.2M
25.20 mi14:42:193:44:308:553:34
10:21
+0:47
Finish
26.22 mi14:51:473:53:588:569:28
9:17
-1:04

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

8:16 /mi

Average Pace

8:56 /mi

Slowest Pace

10:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:05

56% of race

Time at Steady Pace

1:16:45

33% of race

Time at Slower Pace

26:08

11% of race

Average Pace: 8:55 /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 mi11:23:2925:408:1625:40
8:16
#18491
10K
6.21 mi11:49:1851:298:1725:49
8:19
#18521
15K
9.32 mi12:14:591:17:108:1725:41
8:16
#18276
20K
12.43 mi12:41:341:43:458:2126:35
8:33
#18308
Half
13.11 mi12:47:201:49:318:215:46
8:27
#18328
25K
15.53 mi13:08:542:11:058:2621:34
8:54
#18527
30K
18.64 mi13:38:282:40:398:3729:34
9:31
#18862
20M
20.00 mi13:51:292:53:408:4113:01
9:35
#18927
21M
21.00 mi14:01:573:04:088:4610:28
10:28
#19005
35K
21.75 mi14:08:533:11:048:476:56
9:16
#19027
23M
23.00 mi14:20:593:23:108:5012:06
9:40
#19068
24M
24.00 mi14:30:343:32:458:529:35
9:35
#19115
40K
24.85 mi14:38:453:40:568:538:11
9:34
#19100
25.2M
25.20 mi14:42:193:44:308:553:34
10:21
#19083
Finish
26.22 mi14:51:473:53:588:569:28
9:17
#19130
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi184916626662617838(Top 63%)6227(Top 51%)6227(Top 626%)
10K6.21 mi3.10 mi18521-306630-46630-418622(Top 66%)6665(Top 55%)6665(Top 671%)
15K9.32 mi3.11 mi18276+2456491+1396491+13917838(Top 63%)6227(Top 51%)6227(Top 626%)
20K12.43 mi3.11 mi18308-326514-236514-2318592(Top 65%)6680(Top 55%)6680(Top 672%)
Half13.11 mi0.68 mi18328-206532-186532-1818956(Top 67%)6879(Top 56%)6879(Top 692%)
25K15.53 mi2.42 mi18527-1996656-1246656-12419413(Top 68%)7211(Top 59%)7211(Top 725%)
30K18.64 mi3.11 mi18862-3356865-2096865-20920010(Top 70%)7666(Top 63%)7666(Top 771%)
20M20.00 mi1.36 mi18927-656934-696934-6919532(Top 69%)7541(Top 62%)7541(Top 759%)
21M21.00 mi1.00 mi19005-787010-767010-7619907(Top 70%)7855(Top 64%)7855(Top 790%)
35K21.75 mi0.75 mi19027-227038-287038-2819464(Top 69%)7696(Top 63%)7696(Top 774%)
23M23.00 mi1.25 mi19068-417085-477085-4719335(Top 68%)7694(Top 63%)7694(Top 774%)
24M24.00 mi1.00 mi19115-477130-457130-4519937(Top 70%)8048(Top 66%)8048(Top 810%)
40K24.85 mi0.85 mi19100+157147-177147-1719011(Top 67%)7636(Top 62%)7636(Top 768%)
25.2M25.20 mi0.35 mi19083+177157-107157-1018484(Top 65%)7373(Top 60%)7373(Top 742%)
Finish26.22 mi1.02 mi19130-477200-437200-4320354(Top 72%)8317(Top 68%)8317(Top 837%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21stories
+97ft-345ft

Overall

17838

Females

6227

F55-59

6227

5K→10K

3.1 - 6.2 mi

Top 66%
×5stories
+79ft-138ft

Overall

18622

Females

6665

F55-59

6665

10K→15K

6.2 - 9.3 mi

Top 63%
×3stories
+67ft-78ft

Overall

17838

Females

6227

F55-59

6227

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18592

Females

6680

F55-59

6680

20K→Half

12.4 - 13.1 mi

Top 67%
×2stories
+19ft-37ft

Overall

18956

Females

6879

F55-59

6879

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

19413

Females

7211

F55-59

7211

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

20010

Females

7666

F55-59

7666

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

19532

Females

7541

F55-59

7541

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

19907

Females

7855

F55-59

7855

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19464

Females

7696

F55-59

7696

35K→23M

21.8 - 23.0 mi

Top 68%
×5stories
+23ft-63ft

Overall

19335

Females

7694

F55-59

7694

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

19937

Females

8048

F55-59

8048

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19011

Females

7636

F55-59

7636

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18484

Females

7373

F55-59

7373

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2stories
+22ft-21ft

Overall

20354

Females

8317

F55-59

8317

Passing Analysis

Category:
Athletes Passed
1541
Passed By
2180
Net Change
-639
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18491
5K → 10K252282-30#18491#18521
10K → 15K32277+245#18521#18276
15K → 20K183215-32#18276#18308
20K → Half2949-20#18308#18328
Half → 25K112311-199#18328#18527
25K → 30K148483-335#18527#18862
30K → 20M85150-65#18862#18927
20M → 21M75153-78#18927#19005
21M → 35K5880-22#19005#19027
35K → 23M78119-41#19027#19068
23M → 24M4895-47#19068#19115
24M → 40K7863+15#19115#19100
40K → 25.2M4326+17#19100#19083
25.2M → Finish3077-47#19083#19130
TOTALS15412180-639
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing