Boston Marathon logo
BOSTON MARATHON 2025

Kelly Kelso

Bib: 11357•F

TX

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 38%
Masters (Masters Women)
#0 / 6759
Top 23%
Division (F40-44)
#0 / 1718
Top 46%
Race Day Weather
50°/40°F
broken 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
7:38/mi
23:43
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
48:03
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:12:48
↑ 67↓ 78
20K· 12.43 mi
8:01/mi
1:37:42
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:43:09
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
2:02:37
↑ 66↓ 880.2%
30K· 18.64 mi
8:24/mi
2:28:43
↑ 181↓ 1480.2%
20M
8:38/mi
2:40:27
↑ 64↓ 500.2%
21M
9:21/mi
2:49:48
↑ 106↓ 241.6%
35K· 21.75 mi
8:28/mi
2:56:08
↑ 17↓ 861.7%
23M
8:46/mi
3:07:07
↑ 23↓ 630.6%
24M
8:39/mi
3:15:46
↓ 821.3%
40K· 24.85 mi
8:51/mi
3:23:20
↓ 200.3%
25.2M
9:25/mi
3:26:35
↑ 13↓ 160.2%
Finish· 26.22 mi
8:03/mi
3:34:47
↑ 22↓ 21

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
Time1:43:09
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:51:38
Pace8:31 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2623:437:3823:43
7:38
-
10K
6.21 mi11:14:4648:037:4424:20
7:50
+0:12
15K
9.32 mi11:39:311:12:487:4924:45
7:58
+0:08
20K
12.43 mi12:04:251:37:427:5224:54
8:01
+0:03
Half
13.11 mi12:09:521:43:097:525:27
7:59
-0:02
25K
15.53 mi12:29:202:02:377:5419:28
8:02
+0:03
30K
18.64 mi12:55:262:28:437:5926:06
8:24
+0:22
20M
20.00 mi13:07:102:40:278:0111:44
8:38
+0:14
21M
21.00 mi13:16:312:49:488:059:21
9:21
+0:43
35K
21.75 mi13:22:512:56:088:066:20
8:28
-0:53
23M
23.00 mi13:33:503:07:078:0810:59
8:46
+0:18
24M
24.00 mi13:42:293:15:468:098:39
8:39
-0:07
40K
24.85 mi13:50:033:23:208:117:34
8:51
+0:12
25.2M
25.20 mi13:53:183:26:358:123:15
9:25
+0:34
Finish
26.22 mi14:01:303:34:478:128:12
8:03
-1:22

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

7:38 /mi

Average Pace

8:12 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:49

61% of race

Time at Steady Pace

52:49

25% of race

Time at Slower Pace

31:09

15% of race

Average Pace: 8:11 /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 mi10:50:2623:437:3823:43
7:38
#13399
10K
6.21 mi11:14:4648:037:4424:20
7:50
#14180
15K
9.32 mi11:39:311:12:487:4924:45
7:58
#14725
20K
12.43 mi12:04:251:37:427:5224:54
8:01
#14774
Half
13.11 mi12:09:521:43:097:525:27
7:59
#14820
25K
15.53 mi12:29:202:02:377:5419:28
8:02
#14664
30K
18.64 mi12:55:262:28:437:5926:06
8:24
#14516
20M
20.00 mi13:07:102:40:278:0111:44
8:38
#14512
21M
21.00 mi13:16:312:49:488:059:21
9:21
#14565
35K
21.75 mi13:22:512:56:088:066:20
8:28
#14564
23M
23.00 mi13:33:503:07:078:0810:59
8:46
#14557
24M
24.00 mi13:42:293:15:468:098:39
8:39
#14595
40K
24.85 mi13:50:033:23:208:117:34
8:51
#14598
25.2M
25.20 mi13:53:183:26:358:123:15
9:25
#14581
Finish
26.22 mi14:01:303:34:478:128:12
8:03
#14511
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi133993549354915797(Top 56%)5034(Top 41%)5034(Top 293%)
10K6.21 mi3.10 mi14180-7814046-4974046-49715124(Top 53%)4612(Top 38%)4612(Top 268%)
15K9.32 mi3.11 mi14725-5454389-3434389-34315797(Top 56%)5034(Top 41%)5034(Top 293%)
20K12.43 mi3.11 mi14774-494459-704459-7015058(Top 53%)4673(Top 38%)4673(Top 272%)
Half13.11 mi0.68 mi14820-464486-274486-2715829(Top 56%)5064(Top 41%)5064(Top 295%)
25K15.53 mi2.42 mi14664+1564426+604426+6014146(Top 50%)4280(Top 35%)4280(Top 249%)
30K18.64 mi3.11 mi14516+1484399+274399+2714158(Top 50%)4462(Top 36%)4462(Top 260%)
20M20.00 mi1.36 mi14512+44423-244423-2414651(Top 52%)4850(Top 40%)4850(Top 282%)
21M21.00 mi1.00 mi14565-534479-564479-5615412(Top 54%)5395(Top 44%)5395(Top 314%)
35K21.75 mi0.75 mi14564+14490-114490-1115265(Top 54%)5376(Top 44%)5376(Top 313%)
23M23.00 mi1.25 mi14557+74519-294519-2914971(Top 53%)5317(Top 43%)5317(Top 309%)
24M24.00 mi1.00 mi14595-384571-524571-5215463(Top 54%)5625(Top 46%)5625(Top 327%)
40K24.85 mi0.85 mi14598-34599-284599-2815481(Top 55%)5786(Top 47%)5786(Top 337%)
25.2M25.20 mi0.35 mi14581+174609-104609-1014202(Top 50%)5122(Top 42%)5122(Top 298%)
Finish26.22 mi1.02 mi14511+704598+114598+1113226(Top 47%)4566(Top 37%)4566(Top 266%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15797

Females

5034

F40-44

5034

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

15124

Females

4612

F40-44

4612

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15797

Females

5034

F40-44

5034

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

15058

Females

4673

F40-44

4673

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15829

Females

5064

F40-44

5064

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14146

Females

4280

F40-44

4280

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14158

Females

4462

F40-44

4462

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

14651

Females

4850

F40-44

4850

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15412

Females

5395

F40-44

5395

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15265

Females

5376

F40-44

5376

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14971

Females

5317

F40-44

5317

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15463

Females

5625

F40-44

5625

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15481

Females

5786

F40-44

5786

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14202

Females

5122

F40-44

5122

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13226

Females

4566

F40-44

4566

Passing Analysis

Category:
Athletes Passed
1620
Passed By
2732
Net Change
-1112
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13399
5K → 10K86867-781#13399#14180
10K → 15K68613-545#14180#14725
15K → 20K202251-49#14725#14774
20K → Half2066-46#14774#14820
Half → 25K24185+156#14820#14664
25K → 30K312164+148#14664#14516
30K → 20M135131+4#14516#14512
20M → 21M99152-53#14512#14565
21M → 35K7978+1#14565#14564
35K → 23M9487+7#14564#14557
23M → 24M63101-38#14557#14595
24M → 40K7477-3#14595#14598
40K → 25.2M3821+17#14598#14581
25.2M → Finish10939+70#14581#14511
TOTALS16202732-1112
📊

Passing Visuals

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