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BOSTON MARATHON 2025

Ian Knox

Bib: 621•M

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 6%
Division (M18-39)
#0 / 5642
Top 14%
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
5:48/mi
18:00
↑ 97↓ 3451.5%
10K· 6.21 mi
5:50/mi
36:06
↑ 79↓ 1380.4%
15K· 9.32 mi
5:53/mi
54:24
↑ 67↓ 78
20K· 12.43 mi
5:57/mi
1:12:54
↑ 106↓ 860.1%
Half· 13.11 mi
5:47/mi
1:16:51
↑ 19↓ 370.5%
25K· 15.53 mi
5:59/mi
1:31:22
↑ 66↓ 880.2%
30K· 18.64 mi
6:15/mi
1:50:47
↑ 181↓ 1480.2%
20M
6:26/mi
1:59:31
↑ 64↓ 500.2%
21M
6:44/mi
2:06:15
↑ 106↓ 241.6%
35K· 21.75 mi
6:37/mi
2:11:12
↑ 17↓ 861.7%
23M
6:47/mi
2:19:41
↑ 23↓ 630.6%
24M
6:52/mi
2:26:33
↓ 821.3%
40K· 24.85 mi
6:58/mi
2:32:30
↓ 200.3%
25.2M
7:21/mi
2:35:02
↑ 13↓ 160.2%
Finish· 26.22 mi
6:39/mi
2:41:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:16:51
Pace5:52 /mi
2nd Half
Distance13.11 mi
Time1:24:58
Pace6:29 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:0818:005:4818:00
5:48
-
10K
6.21 mi10:36:1436:065:4918:06
5:50
+0:02
15K
9.32 mi10:54:3254:245:5018:18
5:53
+0:03
20K
12.43 mi11:13:021:12:545:5218:30
5:57
+0:04
Half
13.11 mi11:16:591:16:515:523:57
5:47
-0:10
25K
15.53 mi11:31:301:31:225:5314:31
5:59
+0:12
30K
18.64 mi11:50:551:50:475:5719:25
6:15
+0:16
20M
20.00 mi11:59:391:59:315:598:44
6:26
+0:11
21M
21.00 mi12:06:232:06:156:016:44
6:44
+0:18
35K
21.75 mi12:11:202:11:126:024:57
6:37
-0:07
23M
23.00 mi12:19:492:19:416:048:29
6:47
+0:10
24M
24.00 mi12:26:412:26:336:066:52
6:52
+0:05
40K
24.85 mi12:32:382:32:306:085:57
6:58
+0:06
25.2M
25.20 mi12:35:102:35:026:092:32
7:21
+0:23
Finish
26.22 mi12:41:572:41:496:116:47
6:39
-0:42

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

5:47 /mi

Average Pace

6:11 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:22

56% of race

Time at Steady Pace

39:53

25% of race

Time at Slower Pace

30:34

19% of race

Average Pace: 6:10 /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 mi10:18:0818:005:4818:00
5:48
#604
10K
6.21 mi10:36:1436:065:4918:06
5:50
#622
15K
9.32 mi10:54:3254:245:5018:18
5:53
#633
20K
12.43 mi11:13:021:12:545:5218:30
5:57
#659
Half
13.11 mi11:16:591:16:515:523:57
5:47
#645
25K
15.53 mi11:31:301:31:225:5314:31
5:59
#653
30K
18.64 mi11:50:551:50:475:5719:25
6:15
#695
20M
20.00 mi11:59:391:59:315:598:44
6:26
#720
21M
21.00 mi12:06:232:06:156:016:44
6:44
#728
35K
21.75 mi12:11:202:11:126:024:57
6:37
#751
23M
23.00 mi12:19:492:19:416:048:29
6:47
#804
24M
24.00 mi12:26:412:26:336:066:52
6:52
#872
40K
24.85 mi12:32:382:32:306:085:57
6:58
#924
25.2M
25.20 mi12:35:102:35:026:092:32
7:21
#940
Finish
26.22 mi12:41:572:41:496:116:47
6:39
#986
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi604560560739(Top 3%)691(Top 4%)691(Top 12%)
10K6.21 mi3.10 mi622-18576-16576-16659(Top 2%)615(Top 4%)615(Top 11%)
15K9.32 mi3.11 mi633-11588-12588-12739(Top 3%)691(Top 4%)691(Top 12%)
20K12.43 mi3.11 mi659-26612-24612-24759(Top 3%)711(Top 4%)711(Top 13%)
Half13.11 mi0.68 mi645+14598+14598+14576(Top 2%)542(Top 3%)542(Top 10%)
25K15.53 mi2.42 mi653-8606-8606-8765(Top 3%)717(Top 4%)717(Top 13%)
30K18.64 mi3.11 mi695-42648-42648-421054(Top 4%)990(Top 6%)990(Top 18%)
20M20.00 mi1.36 mi720-25673-25673-251316(Top 5%)1243(Top 8%)1243(Top 22%)
21M21.00 mi1.00 mi728-8680-7680-71286(Top 5%)1215(Top 8%)1215(Top 22%)
35K21.75 mi0.75 mi751-23702-22702-222995(Top 11%)2750(Top 17%)2750(Top 49%)
23M23.00 mi1.25 mi804-53754-52754-522556(Top 9%)2359(Top 15%)2359(Top 42%)
24M24.00 mi1.00 mi872-68818-64818-643856(Top 14%)3409(Top 21%)3409(Top 60%)
40K24.85 mi0.85 mi924-52867-49867-493630(Top 13%)3200(Top 20%)3200(Top 57%)
25.2M25.20 mi0.35 mi940-16883-16883-162638(Top 9%)2340(Top 15%)2340(Top 41%)
Finish26.22 mi1.02 mi986-46926-43926-433609(Top 13%)3135(Top 19%)3135(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21story building
+97ft-345ft

Overall

739

Males

691

M18-39

691

5K→10K

3.1 - 6.2 mi

Top 2%
×5story building
+79ft-138ft

Overall

659

Males

615

M18-39

615

10K→15K

6.2 - 9.3 mi

Top 3%
×3story building
+67ft-78ft

Overall

739

Males

691

M18-39

691

15K→20K

9.3 - 12.4 mi

Top 3%
×5story building
+106ft-86ft

Overall

759

Males

711

M18-39

711

20K→Half

12.4 - 13.1 mi

Top 2%
×2story building
+19ft-37ft

Overall

576

Males

542

M18-39

542

Half→25K

13.1 - 15.5 mi

Top 3%
×4story building
+66ft-88ft

Overall

765

Males

717

M18-39

717

25K→30K

15.5 - 18.6 mi

Top 4%
×9story building
+181ft-148ft

Overall

1054

Males

990

M18-39

990

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1316

Males

1243

M18-39

1243

20M→21M

20.0 - 21.0 mi

Top 5%
×8story building
+106ft-24ft

Overall

1286

Males

1215

M18-39

1215

21M→35K

21.0 - 21.8 mi

Top 11%
×7story building
+17ft-86ft

Overall

2995

Males

2750

M18-39

2750

35K→23M

21.8 - 23.0 mi

Top 9%
×5story building
+23ft-63ft

Overall

2556

Males

2359

M18-39

2359

23M→24M

23.0 - 24.0 mi

Top 14%
×6story building
+12ft-82ft

Overall

3856

Males

3409

M18-39

3409

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3630

Males

3200

M18-39

3200

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2638

Males

2340

M18-39

2340

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2story building
+22ft-21ft

Overall

3609

Males

3135

M18-39

3135

Passing Analysis

Category:
Athletes Passed
160
Passed By
542
Net Change
-382
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#604
5K → 10K2543-18#604#622
10K → 15K1425-11#622#633
15K → 20K1743-26#633#659
20K → Half151+14#659#645
Half → 25K2129-8#645#653
25K → 30K1759-42#653#695
30K → 20M1035-25#695#720
20M → 21M1220-8#720#728
21M → 35K730-23#728#751
35K → 23M659-53#751#804
23M → 24M371-68#804#872
24M → 40K456-52#872#924
40K → 25.2M319-16#924#940
25.2M → Finish652-46#940#986
TOTALS160542-382
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing