All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2026

Grant Rozeboom

Bib: 1449β€’M

CA

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Top 4%
Gender (Male)
#0 / 16340
Top 7%
Masters (Masters Men)
#0 / 10617
Top 1%
Age Group (M40-44)
#0 / 2198
Top 5%
Race Day Weather
51Β°/41Β°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
18:49
3.11 mi
Rank: #1406
Start β†’ 5K
18:49 | 6:04/mi
10K
37:36
6.21 mi
Rank: #1451 (-45)
5K β†’ 10K
18:47 | 6:03/mi
15K
56:22
9.32 mi
Rank: #1486 (-35)
10K β†’ 15K
18:46 | 6:03/mi
20K
1:15:14
12.43 mi
Rank: #1472 (+14)
15K β†’ 20K
18:52 | 6:05/mi
HALF
1:19:19
13.11 mi
Rank: #1468 (+4)
20K β†’ HALF
4:05 | 6:00/mi
25K
1:34:00
15.53 mi
Rank: #1431 (+37)
HALF β†’ 25K
14:41 | 6:04/mi
30K
1:53:11
18.64 mi
Rank: #1358 (+73)
25K β†’ 30K
19:11 | 6:11/mi
20M
2:01:38
20.00 mi
Rank: #1330 (+28)
30K β†’ 20M
8:27 | 6:14/mi
21M
2:08:14
21.00 mi
Rank: #1323 (+7)
20M β†’ 21M
6:36 | 6:36/mi
35K
2:12:46
21.75 mi
Rank: #1324 (-1)
21M β†’ 35K
4:32 | 6:04/mi
23M
2:20:34
23.00 mi
Rank: #1304 (+20)
35K β†’ 23M
7:48 | 6:14/mi
24M
2:26:42
24.00 mi
Rank: #1293 (+11)
23M β†’ 24M
6:08 | 6:08/mi
40K
2:32:02
24.85 mi
Rank: #1278 (+15)
24M β†’ 40K
5:20 | 6:15/mi
25.2M
2:34:21
25.20 mi
Rank: #1281 (-3)
40K β†’ 25.2M
2:19 | 6:44/mi
FINISH
2:40:28
26.22 mi
Rank: #1267 (+14)
25.2M β†’ FINISH
6:07 | 6:01/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:19:19
Pace6:04 /mi
2nd Half
Distance13.11 mi
Time1:21:09
Pace6:12 /mi
πŸ“ŠPositive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:2618:496:0418:49
6:04
-
10K
6.21 mi10:38:1337:366:0418:47
6:03
-0:01
15K
9.32 mi10:56:5956:226:0318:46
6:03
0:00
20K
12.43 mi11:15:511:15:146:0418:52
6:05
+0:02
HALF
13.11 mi11:19:561:19:196:044:05
6:00
-0:05
25K
15.53 mi11:34:371:34:006:0414:41
6:04
+0:04
30K
18.64 mi11:53:481:53:116:0519:11
6:11
+0:07
20M
20.00 mi12:02:152:01:386:058:27
6:14
+0:03
21M
21.00 mi12:08:512:08:146:076:36
6:36
+0:22
35K
21.75 mi12:13:232:12:466:074:32
6:04
-0:32
23M
23.00 mi12:21:112:20:346:077:48
6:14
+0:10
24M
24.00 mi12:27:192:26:426:076:08
6:08
-0:06
40K
24.85 mi12:32:392:32:026:085:20
6:15
+0:07
25.2M
25.20 mi12:34:582:34:216:082:19
6:44
+0:29
FINISH
26.22 mi12:41:052:40:286:086:07
6:01
-0:43

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

πŸ“ˆPace 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

6:00 /mi

Average Pace

6:07 /mi

Slowest Pace

6:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

πŸ“ŠSegments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:38:09

99% of race

Time at Steady Pace

2:19

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:07 /mi

Loading chart...
Faster pace (< avg)
Steady pace (β‰ˆ 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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:19:2618:496:0418:49
6:04
#1406
10K
6.21 mi10:38:1337:366:0418:47
6:03
#1451
15K
9.32 mi10:56:5956:226:0318:46
6:03
#1486
20K
12.43 mi11:15:511:15:146:0418:52
6:05
#1472
HALF
13.11 mi11:19:561:19:196:044:05
6:00
#1468
25K
15.53 mi11:34:371:34:006:0414:41
6:04
#1431
30K
18.64 mi11:53:481:53:116:0519:11
6:11
#1358
20M
20.00 mi12:02:152:01:386:058:27
6:14
#1330
21M
21.00 mi12:08:512:08:146:076:36
6:36
#1323
35K
21.75 mi12:13:232:12:466:074:32
6:04
#1324
23M
23.00 mi12:21:112:20:346:077:48
6:14
#1304
24M
24.00 mi12:27:192:26:426:076:08
6:08
#1293
40K
24.85 mi12:32:392:32:026:085:20
6:15
#1278
25.2M
25.20 mi12:34:582:34:216:082:19
6:44
#1281
FINISH
26.22 mi12:41:052:40:286:086:07
6:01
#1267
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1406134913491526(Top 5%)1469(Top 9%)1469(Top 67%)
10K6.21 mi3.10 mi1451-451396-471396-471540(Top 5%)1481(Top 9%)1481(Top 67%)
15K9.32 mi3.11 mi1486-351430-341430-341526(Top 5%)1469(Top 9%)1469(Top 67%)
20K12.43 mi3.11 mi1472+141415+151415+151458(Top 5%)1406(Top 9%)1406(Top 64%)
HALF13.11 mi0.68 mi1468+41411+41411+41397(Top 5%)1347(Top 8%)1347(Top 61%)
25K15.53 mi2.42 mi1431+371379+321379+321283(Top 4%)1236(Top 8%)1236(Top 56%)
30K18.64 mi3.11 mi1358+731306+731306+731198(Top 4%)1156(Top 7%)1156(Top 53%)
20M20.00 mi1.36 mi1330+281282+241282+241232(Top 4%)1185(Top 7%)1185(Top 54%)
21M21.00 mi1.00 mi1323+71275+71275+71600(Top 6%)1532(Top 9%)1532(Top 70%)
35K21.75 mi0.75 mi1324-1127512751400(Top 5%)1344(Top 8%)1344(Top 61%)
23M23.00 mi1.25 mi1304+201255+201255+201303(Top 4%)1250(Top 8%)1250(Top 57%)
24M24.00 mi1.00 mi1293+111244+111244+111491(Top 5%)1414(Top 9%)1414(Top 64%)
40K24.85 mi0.85 mi1278+151228+161228+161469(Top 5%)1386(Top 8%)1386(Top 63%)
25.2M25.20 mi0.35 mi1281-31230-21230-21532(Top 5%)1438(Top 9%)1438(Top 65%)
FINISH26.22 mi1.02 mi1267+141217+131217+131619(Top 6%)1518(Top 9%)1518(Top 69%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
Γ—21
+97ft-345ft

Overall

1526

Males

1469

M40-44

1469

5K→10K

3.1 - 6.2 mi

Top 5%
Γ—5
+79ft-138ft

Overall

1540

Males

1481

M40-44

1481

10K→15K

6.2 - 9.3 mi

Top 5%
Γ—3
+67ft-78ft

Overall

1526

Males

1469

M40-44

1469

15K→20K

9.3 - 12.4 mi

Top 5%
Γ—5
+106ft-86ft

Overall

1458

Males

1406

M40-44

1406

20K→HALF

12.4 - 13.1 mi

Top 5%
Γ—2
+19ft-37ft

Overall

1397

Males

1347

M40-44

1347

HALF→25K

13.1 - 15.5 mi

Top 4%
Γ—4
+66ft-88ft

Overall

1283

Males

1236

M40-44

1236

25K→30K

15.5 - 18.6 mi

Top 4%
Γ—9
+181ft-148ft

Overall

1198

Males

1156

M40-44

1156

30K→20M

18.6 - 20.0 mi

Top 4%
Γ—5
+64ft-50ft

Overall

1232

Males

1185

M40-44

1185

20M→21M

20.0 - 21.0 mi

Top 6%
Γ—8
+106ft-24ft

Overall

1600

Males

1532

M40-44

1532

21M→35K

21.0 - 21.8 mi

Top 5%
Γ—7
+17ft-86ft

Overall

1400

Males

1344

M40-44

1344

35K→23M

21.8 - 23.0 mi

Top 4%
Γ—5
+23ft-63ft

Overall

1303

Males

1250

M40-44

1250

23M→24M

23.0 - 24.0 mi

Top 5%
Γ—6
+12ft-82ft

Overall

1491

Males

1414

M40-44

1414

24M→40K

24.0 - 24.9 mi

Top 5%
Γ—1
+6ft-20ft

Overall

1469

Males

1386

M40-44

1386

40K→25.2M

24.9 - 25.2 mi

Top 5%
Γ—1
+13ft-16ft

Overall

1532

Males

1438

M40-44

1438

25.2M→FINISH

25.2 - 26.2 mi

Top 6%
Γ—2
+22ft-21ft

Overall

1619

Males

1518

M40-44

1518

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
499
Passed By
360
Net Change
+139
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start β†’ 5K----#1406
5K β†’ 10K56101-45#1406#1451
10K β†’ 15K3166-35#1451#1486
15K β†’ 20K4632+14#1486#1472
20K β†’ HALF106+4#1472#1468
HALF β†’ 25K6124+37#1468#1431
25K β†’ 30K9522+73#1431#1358
30K β†’ 20M368+28#1358#1330
20M β†’ 21M2417+7#1330#1323
21M β†’ 35K1415-1#1323#1324
35K β†’ 23M4020+20#1324#1304
23M β†’ 24M2918+11#1304#1293
24M β†’ 40K227+15#1293#1278
40K β†’ 25.2M912-3#1278#1281
25.2M β†’ FINISH2612+14#1281#1267
TOTALS499360+139
πŸ“Š

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

πŸ“ˆPosition Graph

Loading...

🎨Heatmap Timeline

Loading...

πŸ”„Passing Circle

Loading...

🌊Position Flow

Loading...

πŸƒRace Lanes

Loading...

Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

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