Boston Marathon logo
BOSTON MARATHON 2025

Ivana Knudson

Bib: 18164•F

CO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 35%
Masters (Masters Women)
#0 / 6759
Top 20%
Division (F45-49)
#0 / 1813
Top 23%
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
8:18/mi
25:47
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
51:11
↑ 79↓ 1380.4%
15K· 9.32 mi
7:57/mi
1:15:54
↑ 67↓ 78
20K· 12.43 mi
7:59/mi
1:40:43
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:46:05
↑ 19↓ 370.5%
25K· 15.53 mi
7:58/mi
2:05:25
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:31:08
↑ 181↓ 1480.2%
20M
8:20/mi
2:42:28
↑ 64↓ 500.2%
21M
8:43/mi
2:51:11
↑ 106↓ 241.6%
35K· 21.75 mi
8:00/mi
2:57:10
↑ 17↓ 861.7%
23M
8:02/mi
3:07:14
↑ 23↓ 630.6%
24M
7:51/mi
3:15:05
↓ 821.3%
40K· 24.85 mi
7:49/mi
3:21:46
↓ 200.3%
25.2M
8:19/mi
3:24:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:36/mi
3:32:23
↑ 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 Half⚖️ Balanced
Distance13.11 mi
Time1:46:05
Pace8:06 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:46:18
Pace8:07 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:5625:478:1825:47
8:18
-
10K
6.21 mi11:42:2051:118:1425:24
8:11
-0:07
15K
9.32 mi12:07:031:15:548:0924:43
7:57
-0:14
20K
12.43 mi12:31:521:40:438:0624:49
7:59
+0:02
Half
13.11 mi12:37:141:46:058:065:22
7:52
-0:07
25K
15.53 mi12:56:342:05:258:0419:20
7:58
+0:06
30K
18.64 mi13:22:172:31:088:0625:43
8:17
+0:19
20M
20.00 mi13:33:372:42:288:0711:20
8:20
+0:03
21M
21.00 mi13:42:202:51:118:098:43
8:43
+0:23
35K
21.75 mi13:48:192:57:108:095:59
8:00
-0:43
23M
23.00 mi13:58:233:07:148:0810:04
8:02
+0:02
24M
24.00 mi14:06:143:15:058:087:51
7:51
-0:11
40K
24.85 mi14:12:553:21:468:076:41
7:49
-0:02
25.2M
25.20 mi14:15:473:24:388:072:52
8:19
+0:30
Finish
26.22 mi14:23:323:32:238:067:45
7:36
-0:43

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

7:36 /mi

Average Pace

8:06 /mi

Slowest Pace

8:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:40

96% of race

Time at Steady Pace

8:43

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:06 /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 mi11:16:5625:478:1825:47
8:18
#18710
10K
6.21 mi11:42:2051:118:1425:24
8:11
#18217
15K
9.32 mi12:07:031:15:548:0924:43
7:57
#17385
20K
12.43 mi12:31:521:40:438:0624:49
7:59
#16716
Half
13.11 mi12:37:141:46:058:065:22
7:52
#16609
25K
15.53 mi12:56:342:05:258:0419:20
7:58
#16122
30K
18.64 mi13:22:172:31:088:0625:43
8:17
#15560
20M
20.00 mi13:33:372:42:288:0711:20
8:20
#15312
21M
21.00 mi13:42:202:51:118:098:43
8:43
#15042
35K
21.75 mi13:48:192:57:108:095:59
8:00
#14915
23M
23.00 mi13:58:233:07:148:0810:04
8:02
#14605
24M
24.00 mi14:06:143:15:058:087:51
7:51
#14400
40K
24.85 mi14:12:553:21:468:076:41
7:49
#14179
25.2M
25.20 mi14:15:473:24:388:072:52
8:19
#14056
Finish
26.22 mi14:23:323:32:238:067:45
7:36
#13855
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi187106743674315708(Top 55%)4972(Top 41%)4972(Top 274%)
10K6.21 mi3.10 mi18217+4936460+2836460+28317719(Top 62%)6127(Top 50%)6127(Top 338%)
15K9.32 mi3.11 mi17385+8325941+5195941+51915708(Top 55%)4972(Top 41%)4972(Top 274%)
20K12.43 mi3.11 mi16716+6695564+3775564+37714845(Top 52%)4558(Top 37%)4558(Top 251%)
Half13.11 mi0.68 mi16609+1075508+565508+5614845(Top 52%)4523(Top 37%)4523(Top 249%)
25K15.53 mi2.42 mi16122+4875228+2805228+28013697(Top 48%)4057(Top 33%)4057(Top 224%)
30K18.64 mi3.11 mi15560+5624976+2524976+25213350(Top 47%)4028(Top 33%)4028(Top 222%)
20M20.00 mi1.36 mi15312+2484864+1124864+11212792(Top 45%)3858(Top 32%)3858(Top 213%)
21M21.00 mi1.00 mi15042+2704748+1164748+11611826(Top 42%)3511(Top 29%)3511(Top 194%)
35K21.75 mi0.75 mi14915+1274688+604688+6012303(Top 43%)3810(Top 31%)3810(Top 210%)
23M23.00 mi1.25 mi14605+3104549+1394549+13910380(Top 37%)2938(Top 24%)2938(Top 162%)
24M24.00 mi1.00 mi14400+2054452+974452+9710248(Top 36%)2943(Top 24%)2943(Top 162%)
40K24.85 mi0.85 mi14179+2214378+744378+748950(Top 32%)2447(Top 20%)2447(Top 135%)
25.2M25.20 mi0.35 mi14056+1234319+594319+597830(Top 28%)2019(Top 17%)2019(Top 111%)
Finish26.22 mi1.02 mi13855+2014244+754244+7510039(Top 35%)3021(Top 25%)3021(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15708

Females

4972

F45-49

4972

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

17719

Females

6127

F45-49

6127

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15708

Females

4972

F45-49

4972

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

14845

Females

4558

F45-49

4558

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14845

Females

4523

F45-49

4523

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

13697

Females

4057

F45-49

4057

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13350

Females

4028

F45-49

4028

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12792

Females

3858

F45-49

3858

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11826

Females

3511

F45-49

3511

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

12303

Females

3810

F45-49

3810

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10380

Females

2938

F45-49

2938

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

10248

Females

2943

F45-49

2943

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8950

Females

2447

F45-49

2447

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7830

Females

2019

F45-49

2019

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2story building
+22ft-21ft

Overall

10039

Females

3021

F45-49

3021

Passing Analysis

Category:
Athletes Passed
5049
Passed By
194
Net Change
+4855
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18710
5K → 10K59299+493#18710#18217
10K → 15K84210+832#18217#17385
15K → 20K6734+669#17385#16716
20K → Half1125+107#16716#16609
Half → 25K4925+487#16609#16122
25K → 30K58321+562#16122#15560
30K → 20M26012+248#15560#15312
20M → 21M28212+270#15312#15042
21M → 35K1336+127#15042#14915
35K → 23M3199+310#14915#14605
23M → 24M2083+205#14605#14400
24M → 40K2232+221#14400#14179
40K → 25.2M1241+123#14179#14056
25.2M → Finish2065+201#14056#13855
TOTALS5049194+4855
📊

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